For those of you who don\'t know, Deliverance is a very disturbing film.
Two guys take a trip down a river, boat wrecks, and local types do nasty things to our boat travelling heroes.
One says \"Boy, I\'m gonna make you squeal like a pig,\" and proceeds to do something nasty to the first guy, and indeed makes him squeal like a pig.
The reference is to the drop of pants. And all the characters mentioned were male, BTW.