This term is often used by some I know as a kind of joke, not implying its obvious reason. Rather than having references to an actual pimp, it's used to describe something that's cool, in style, or amazes the speaker so much they can't think of anything else to say.
"Hey look! have no science homework today!"
"That's pimpin!"
1. nickname similar to playboy, playa, stud, pimp, etc.
2. adjective similar to fresh, clean, tight, gangsta etc.
1. you dont wanna mess wit me, pimpin'.
2. keep it pimpin' homie!
The complement Urban Dictionary gives you upon having made 400 editing descisions.
"You've made 400 decisions so far. Pimpin."
something thats awesome or looks or is really cool.
shit man. thats car is pimpin'