(despite these other defintions, booty does not just mean an ass, thats what the word ass is for)
Booty means a perky, rounded ass, usually applied to women and used to describe said ass' high desireability. The ass can be bigger than average but not too big. See also bootay
Note that it doesn't apply to an ass that is just fat or big, for that see fatass or just look at yo momma.
That girl's got a nice booty!
Damn G, check out that fine bootay!
A main character in the webcomic "Sluggy Freelance"
He's a little white mini-lop with the attitude of a homicidal gangster. Favorite weapon is a switch-blade but also has a gun (where all this is stashed in anyones guess)
He don't take no shit and will cut you like a bitch at the drop of a hat