Scouse chuck
An act in which a person, upon entering a shower and suddenly have an urge to defecate, craps into their hand and throws it across the bathroom into the toilet, rather than leaving the shower.
"I was already in the shower, so I just scouse chucked it. I figured if it went in then it went in, but if it missed, well, I was going to leave the shower to crap anyway - may as well chance it. As it happened it I landed the shot, but it hit the backboard."