The effect of the violent purging of liquid shit from the back passage, which leaves a 'splattering' of crap on the back of the toilet bowl, not dissimilar from a type of exterior wall coating.

For maximum effect the 'pebble dasher' requires a significant amount of 'wind' in their system and must strain hard whilst simultaneous holding their ring piece closed (with hands if required). Once enough pressure has built up the opening of the ring piece will allow the pebble dashing to occur.

Pebble dashers should note that one school of thought maintains that given extreme straining, the material exiting the rear can potentially achieve super sonic velocities, momentarily creating a shock wave that can tear the ring piece. Their advice is therefore not to strain too hard!
I never pebble dash at home, only in mates houses.....and then leave it!
by Ryd June 25, 2006
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When one has extremely runny diareha and it splatters all over the toilet giving a pebble dash effect
cor man i pebble dashed the pan last night
by tyrus December 05, 2003
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The act of pebble dashing, or to pebble dash, is the act of passing gas with a "wet kiss". The "pebbles" are dashed from the "lips" during the "wet kiss".

The act of slinging bits of poo during a wet fart.
When I farted I accidentally pebble dashed my shorts. The wife hates it when I pebble dash.
by Bubbacop November 01, 2008
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The result of a shotgun shit, the spattering of poo all over the sides of the toilet bowl.
"It felt like too risky a fart to do without being sat on the toilet, I'm glad I didn't take a chance on it because as I let it rip some shit came out and I pebble dashed the sides of the bowl"
by bruciebaby October 15, 2014
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The result of a shotgun shit, the spattering of poo all over the sides of the toilet bowl.
"It felt like too risky a fart to do without being sat on the toilet, I'm glad I didn't take a chance on it because as I let it rip some shit came out and I pebble dashed the sides of the bowl"
by bruciebaby October 15, 2014
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Explosive diahorrea

Etymology:

Pebble dash: concrete and pebble render applied to building facades esp in UK / Ireland during the 70s and 80s. The net effect on the inside of the toilet bowl is similar, albeit generally in brown.

Jacks: UK / Irish slang for toilet
Sarah found that yoga upset her stomach so much that she had to leave class and pebble dash the jacks for 15 minutes.
by singlewhitegov November 23, 2011
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