look up any word, like sapiosexual:
 
1.
To “grunt the semi” is to drunkenly gyrate ones partially erect penis against consenting older (40+) women on a nightclub dancefloor. Apparently, this is something of a trend amongst the younger monkeys.
AH was grunting the semi with several MILFs on Saturday night.
by intermaweb.net November 28, 2005
7 31