Constipissing

When you want to piss but the damn pee won't come out! Possibly because your urethra is jammed with cum, pussy juice, coke, whatever

Etymology: verb form of constapiss, which is cheaply and crudely derived from the term constipate

Adam: I nearly blew my balls out when I tried to take a piss... I was constipissing!

Lilith: Have you been jamming blow up your urethra again?!

Adam (meekly): yes :(