The act of fornicating with a female from the rear in a manner that requires the male adopt a bent knee, or squatting position. Prevalent among couples with large discrepancies in height.
My legs were tired from an hour of squcking, and at this point I was just pissed in general, so I may or may not have mistakenly "missed" my target in favor of her number 2.
To masturbate at a summer camp on a bed made of springs. It makes a squeaking sound so everyone else in the cabin knows your jacking off.
At camp when i was masturbating/bed squeaking the guy under me kept yelling "would you stop it!!!" it also works for minorities like women and gays, too!