An unfortunate medical condition often leading to the sufferer experiencing a drippy tiddler. Often resulting in having to wear wet pants, which give off acrid steam if too close to a radiator.
Origin: Eck Static and Bloomin' Press of The Filth.
B.P. "I once pissed me pants at school"
Eck: "what was it, Weak Willy? Weak Willy, eh?"