A rare shit that leaves the arse with great force, and appears to break up on contact with the air.
The fragments of shit (or pebbles) hit the porcelain and shatter like brown paintballs, virtually covering the bowl save for little spaces inbetween.
The resulting effect, if done right, resembles a late 20th Century British, PEBBLEDASHED house.
Greg: Dude, check this out, I just pebbledashed your loo.
The act of desecrating the toilet due to an over reliance on protein shakes and excessive time in the gym (without any focus on sphincter muscle exercises).
Darren Fletcher is known to have routinely pebblenashed the toilets at Old Trafford, that's why he's no longer in the team.
Fucking hellNash, you been on the Maximuscle again? The bogs have been proper pebblenashed, you dirty bastard.
That incessant little pebble which manages to find It's way underneath your skateboardwheel, which typically results in sudden stops without alert.
I was haulin' ass downhill and encountered the "devil's pebble"
I was so happy when that douchebag hit a devils pebble, it served him right.
That hill is a mess, it's littered with devils pebbles'-