shit on a wall

When you half-ass anything. When you just throw out a guess.

"How did you do on the test Onalee?"

"I don't know I just threw shit on a wall."

Shit the Walls

• Southern slang / exaggeration on an expected or unexpected EXTREME poo which is so extreme that the walls could fall victim.

• So much poo that the walls are covered

I’m about to shit the walls after eatin’ Marlene’s left overs