the ass of a cat; the circular hole below the tail which expands and releases shit/flatulance
cats are the only animal that you can wake up at 3am turn around on your pillow and see a suction butt right in your face!!!!!
by betty buttckiss March 31, 2008
1 more definition
when your ass sucks up your pants,shorts resulting in a mega wedgie...happens mostly to fat people
Damn she has suction butt in her mom jeans...
by rosepetals July 21, 2014