throw some water on him/her

He/she is a suspected or proven snitch. "Throw some water on him/her" refers to the snitch wearing a wire and the water ruining the device .

A way of warning that a person is a snitch

Throw some water on him/her is used as-
Throw some water on chad. He's been talking to the boss alot recently and I'm pretty sure he got tyler fired

That's how this works, you can throw him/her

A phrase used to justify the throwing of short people during Throw short people month.

Person1: Wait, you can't just throw her, it's disrespectful
Person2: Yes you can, it's Throw short people month
Person 3: Yeah, That's how this works, you can throw him/her