Chipmunk Share definition Flag To stab a girl's crotch violently with your penis. It must go all the way into the crotch for it to be a "chipmunk" Todd: "Dude, I chipmunked Vanessa last night!" Ian: "Big f*****g deal, I chipmunked YO MOMMA 2 MIN AGO! Chipmunk by YeMaj 44 June 2, 2008