Low-balling

The act of covering your balls lower then they really are to make it look like you have a big penis.

"At our soccer game patrick kept low-balling because he has such a small dick"

Low As Balls

what you say when you or someone else is very depressed.

Exhibit A:
*kid cries in corner in the high school’s hallway*

A: Hey dude, check it out.

B: Damn, he’s low as balls today.

Exhibit B:
“yesterday i was low as balls.”

low ball grunter

A style of bouldering problem that's short in height but contains burly moves. Commonly sloped slappy holds and body tension required. Not to be underestimated.

Coor that's a low ball grunter that mate!

Low-Balling

Pose a question or challenge to someone knowing they can't answer it.

You're low-balling me by asking about engineering, you know I've never liked math.