But wet.? Wet is slang for using PCP, or sherm.
So being, or going "wet in the paint" would be a step up from "going hard in the paint" wet in the paint would be more violent, drug-addled and careless. But still synonymous to gettn buck, goin hard, and goin dumb. Wet in the paint; think of Kobe Bryant on PCP=unstoppable.