1 definition by Sarrbear
Where 2+ guys sit in a row (or circle) and the girl rides the first guy to get an erection to the last guy to get one, in order. The penis is the "mole", while the girl is the "mallet/hammer"
Kelly: "Scott, John, Mike and i played whack-a-mole all. night. long. You should join us next time."
Josh: "i don't know, maybe...."
Josh: "i don't know, maybe...."
by Sarrbear December 21, 2010