Excercise where you clench your butt repeatidly. If done regularly and very OFTEN it results in a very fine firm ass!
by Nallis December 08, 2006
Buttclench is an expression to aftermath oral sex. For example, there are gay men who began squeezing their ass together As they suck eachother's dick until it erupts.
by Dorkievs Irects May 16, 2018