n. the cleavage at the bottom of ur butt and top of ur leg. Usually on girls with bigger butts. Also known as under tuck.
Guy 1: Damn! do u see that chick over there? shes got a nice ass!
Guy 2: Yeah shes got a nice under butt too!
Guy 2: Yeah shes got a nice under butt too!
by katiegurl19512 October 23, 2009

if a girl bra is called over the shoulder bolder holder, then what is a boy's boxers called? under the butt nut hut?
by DeathByBuda December 19, 2011

Tighty Whities, BVD's... etc.
"all this running is makin my balls flop around!" awwww that sucks, shoulda got an Under-the-butt nut hut
by Kyle Tat June 21, 2008

The girl got so wet you could find her on doppler radar, I had to keep dry in her under the butt nut hut...
by Von Dubz February 22, 2004

by TheHighGuyandTheDoN April 21, 2018
