Similar Words to Buttocks:
Arse
Ass
Backside
Behind
Bottom
Bum
Buns
Butt
Can
Derriere
Fanny
Fundament
Hind End
Hindquarters
Keister
Nates
Posterior
Prat
Rear
Rear End
Rump
Seat
Stern
Tail
Tail End
Tooshie
Tush
Definitions of Buttocks:
1. The fleshy part of the human body that you sit on