turdpercher
Person who takes a dump and doesn't flush it right away, but prefers to sit there, a scant few inches, above their sopping wet pile of stinking feces.
Public washroom, guy in stall #1 hears guy in stall #2 drop the splashbomb. In the next few seconds there is rancid odor, but no flushing!?! So, guy in stall #1 bangs on the wall, shouting...
"...Hey, turdpercher, how 'bout a courtesy flush Yo!!
"...Hey, turdpercher, how 'bout a courtesy flush Yo!!