Hi. This Is a List of Butt-Related Words.

Definition - buttocks

The oldest sense of caboose, dating back to the early 18th century, is “a ship’s galley.” In the 19th century the word took on the meaning of “a freight-train car attached usually to the rear mainly for the use of the train crew,” and in the early 20th century began seeing use as a synonym for buttocks. It is one of a large number of such synonyms in English which come from words relating to the bottom or back of something, including bottom, rear end, backside, posterior, and fundament.

But the miracle had not ceased. By dropping her hands still further, placing the palms on either side of her caboose, elbows akimbo, assuming a rolling motion with hips, she had now metamorphosed into a wicked, Carmen type of female.
— Gregory La Cava, The Hollywood Reporter, 31 May 1934

Definition - having shapely buttocks

Age tends to give words a certain respectability, which may help explain why callipygian (which has been around since the early 19th century) is often viewed more favorably than the nearly-synonymous bootylicious (which has been around since the end of the 20th century). Callipygian comes from the Greek words for “beauty” and “buttocks” (pygē). The combining form of pyg- is found in many technical words, often too obscure to be found outside of specialized dictionaries, such as pygalgia (“pain in the buttocks”) and dasypygal (“having hairy buttocks”).

Had Mr. B. ever carried up to his Etonian master three such blunders, his Callipygian surface would have been ruffled by a well-merited flagellation.
— The Leeds Mercury (Leeds, Eng.), 21 Jun. 1834

Definition - dialectal, England: to beat on the buttocks 

There are many words in English for the various ways in which a person may be beaten, and the careful writer will take care to choose the one that is correct. For instance, beating with the fists (nevel) should be kept distinct from beating with a stick (fustigate). Similarly, care should be exercised to not mix up the generalized lambaste (“to assault violently”) with the slightly more specific bumbaste (“to beat on the buttocks”). It should be noted that bumbaste is also used to simply mean thrash; worry not, for English is nothing if not resourceful, and has a number of other words for specific methods inflicting violence on the posterior of another, including breech (“to whip on the buttocks”) and cob (“to beat on the buttocks, as with a flat stick”).

Then with the pomel of his sword he did so swetely bumbast him, that he made his helmet to flie of his head.
— William Painter, The palace of pleasure beautified, 1566

Definition - the part of the body a person sits on : buttocks — used euphemistically

Derriere came into English in the middle of the 18th century, from the French derrière. This word in turn comes from the Old French derrier, meaning “back part,” making derriere related to rear end, posterior and backside, except that it’s a bit frenchified.

Look just below mine derriere—It is pinned dere.
— Harlequin premier: a farce, as it is acted daily, 1769

De post vor de general is de derriere, de backside of his army.
— Harlequin premier: a farce, as it is acted daily, 1769

Definition - resembling the buttocks

Natis is the Latin word for “buttocks,” and from it we get our word nates (“buttocks”). But sometimes one has need to referring to things that resemble the buttocks, so we further adopted natis for our natiform. And the speakers of our language have found the need for a number of similar words over the years, for in addition to natiform we have natal (“of or relating to the buttocks”), gluteal (“of, relating to, or in the region of the gluteus muscles”), and pygal (“of, relating to, or located in the region of the rump or posterior end of the back”).

This is put in a Valley, which lyes between the Natiform protuberances, and those which are the Chambers or Thalami of the Optick Nerves; in which place that Glandula or Kernel is fixed, sometimes by very many small Fibres, and sometimes by two noted medullary roots subjected to the part; and besides, it is included in a Membrane, which is a portion of the Pia Mater, as in a Chest; and as this Membrane is stuffed with very many Arteries and Veins, some small Vessels also enter into this Glandula.
— Thomas Willis, The remaining medical works of that famous and renowned physician Dr. Thomas Willis, 1681

Definition - a thin sharp buttock

Our earliest record of [pin buttock] comes from William Shakespeare’s All’s Well that Ends Well, when the clown Lavatch says “It is like a Barbers chaire that fits all buttockes, the pin buttocke, the quatch-buttocke, the brawn buttocke, or any buttocke.” Neither brawn buttock nor quatch buttock appear to have survived past their use in this play, but pin buttock, although rare, may occasionally be found in use independent of Shakespeare.

Thou hadst been better have bit off the dugs of thy Damme, thou pin-buttock Jade thou, than have snapt a bit of mine from me.
— Richard Brome, Five new playes, 1659

Definition - a piece of plate armor covering the buttocks

It is likely, perhaps even certain, that none of our readers began reading this list with the thought ‘I wonder if it will include a word for “butt armor.”’ Yet here we are, presenting you with the word culet, which comes from the diminutive of the French cul (“backside”), and has been in use since the 18th century.

They have for defensive armes, gorgets, curats , cutases, which some call culets, others the guard de reine, because it armeth the hinder parts, from the waste to the saddle crootch….
— Francis Grose, Military antiquities respecting a history of the English army, 1786

Definition - buttocks

English has adopted a good number of words from Yiddish, and often when these first began being used there was a lack of orthographic unanimity, leading to many spelling variations for these words. The Yiddish tokhes is thought to have given rise to a wide range of words for “buttocks” in English, including tush, tushy, tuchus, and tokus.

Jim McMahon has made this a physical Super Bowl. His tushie hurts.
— Dave Klein, Newark Star-Ledger, 24 Jan. 1986