During the act of fellatio, the male partner ejaculates so much semen into his partner's mouth that the partner's cheeks bulge out, giving the appearance of a chipmunk
Dave bumba: Hey frank, did arianna get her wisdom teeth out this weekend? Her cheeks are all puffed out?
Frank turner: no man, I just chipspunked her in the bathroom
The semen of any small woodland creature.
Ted: Dude!! I think that squirrel just Chipspunked all over my head!
Bob: Nah bro, that was me!