Whomp

When an internal bodily function returns to where it once came.

Anon: "Man i was with my girl, had to fart but held it in."
New Fag: "Aw shit man you whomped?"
Anon: "Dude i whomped so hard!"

Splatter of matter on the wall

a euphemism for "shit hits the fan"

Get your work done early in case of a splatter of matter on the wall.

Bro, my dog got out and now I'm not gonna finish this on time.
Dude, rule #1 always prepare for a splatter of matter on the wall! Why you do me like that yo!!