Contrary to popular belief Bubble Butts are ~not~ big asses. Bubble Butts are round like a globe, usually complement a slender/slim body, they are very tight and firm unlike the one's on fat asses...
she is skinny but - dam - she has a bubble-li-cious bubble butt ass.
by gravisan January 02, 2006
A big, fine perfect round ass. It is not huge and gross, just bigger and better than average size. Every girl should have one of these. These anatomical masterpieces can give many guys an erection.
MMMMMMmmmmm.....that lovely redhead has such a big fine bubble butt. :)
by Radical Republican November 05, 2005