If you're going to use 'flip your lid', make sure you're used to being laughed at for having such a gay threat, and that you're using it on people who have no ability to hurt you.
Also can be used as a term for boys jacking off. Refers to 'flipping' or moving the foreskin to get to the glans.
While talking about jacking off:
"Dude, I'm serious, I've gotta flip my lid to get any feeling going on down there."
"See that's why I'm cut, fool."