To urinate involuntarily in one’s underclothes, usually as the result
of extreme fear, hilarity, or excitement.
If you make me laugh
again, I think I might skeep.
“pee my pants” - This
can mean one is laughing so hard that
bladder control is lost, or that
scared and a little squirt gets out. This
definition actually shows
up in the OED with a citation of 1946.