buttock

noun

but·​tock ˈbə-tək 

 also  -(ˌ)täk

1

: the back of a hip that forms one of the fleshy parts on which a person sits

2

buttocks plural

a

: the seat of the body

b

: rump sense 1a

Synonyms

• backside
• behind
• booty [slang]
• bootie
• bottom
• breech
• bum
• buns
• butt
• caboose
• can
• cheeks
• derriere
• derrière
• duff
• fanny
• fundament
• hams
• haunches
• heinie [slang]
• hunkers
• keister [slang]
• keester
• nates
• posterior
• rear
• rear end
• rump
• seat
• tail
• tail end
• tush [slang]

Examples of buttock in a Sentence

she slipped in the mud puddle and hit the ground square on her buttocks

Recent Examples on the Web

The assistant director reported in her complaint that Depardieu had touched her buttocks in the street, then touched her breasts a few days later on location and touched her buttocks again on another occasion. —Elsa Keslassy, Variety, 27 Mar. 2025

Ellipticals also help build strength in the legs by activating the glutes (muscles in the buttocks), quads, hamstrings, and calf muscles. —Tim Petrie, Dpt, Verywell Health, 18 Mar. 2025

Similar to liposuction, the Brazilian Butt Lift (BBL) involves harvesting fat from areas such as the stomach, thighs, or hips and transferring it to the buttocks. —Essence, 17 Mar. 2025

The teen was struck in the buttocks around 4:30 p.m. near the intersection of W. 155th St. and Frederick Douglass Blvd. —Roni Jacobson, New York Daily News, 14 Mar. 2025

Word History

Etymology

Middle English buttok — more at butt entry 1

First Known Use

13th century, in the meaning defined at sense 1

Kids Definition

buttock

noun

but·​tock ˈbət-ək 

1

: the back of the hip which forms one of the fleshy parts on which a person sits

2

plural

a

: the seat of the body

b

: rump sense 1a

Medical Definition

buttock

noun

but·​tock ˈbət-ək 

1

: the back of a hip that forms one of the fleshy parts on which a person sits

2

buttocks plural : the seat of the body

also : the corresponding part of a quadruped : rump