Someone who takes it up the butt.
"Crystal is a slushy butt, that her favorite position."
by Step101 August 29, 2005
that feeling of your ass cheeks gliding together on a hot summer afternoon...
bro I got a serious case of slushy butt going on here, I'm gonna go hook myself up with a safety wipe for good measure.
by FishSum September 14, 2007