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 chances of our buttocks being literally epoxied to a seat are about as small as the chances of our literally rolling in the aisles while watching a funny movie or literally drowning in tears while watching a sad one. —Richard Lederer, San Diego Union-Tribune, 24 May 2025

According to the criminal complaints, the infant’s parents reported the possible abuse July 16 after taking their baby to Children’s Hospital in Minneapolis after finding bruising on her thighs, groin, buttocks and legs. —Kristi Miller, Twin Cities, 20 May 2025

The assistant had also accused him of groping her buttocks and her breasts during three separate incidents on the set. —Shane Croucher, MSNBC Newsweek, 13 May 2025

Fat is taken from the waist and back via liposuction and injected into the buttocks. —David J. Neal, Miami Herald, 8 May 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