Nut sack crack is the crevice between the testicles created from placing your finger in between them.
Joey: Hey, Jim, come check out this nut sack crack.
Jim: Oh wow, dude, that's some nice sack crack!
Joey: Thanks, man, I work out.
Jim: Oh wow, dude, that's some nice sack crack!
Joey: Thanks, man, I work out.
by Psicotik May 29, 2012
Nick liked his wife's Brazilian bikini wax so much that he decided to get himself an up-sack-crack-wax of his very own.
by Dave-o-rama September 29, 2006
by mzyv April 14, 2016