The state of not being pimpin', but owning a cadillac anyhow. ie. doin' it like a small-timer, aka a "shrimp"
Person1: Man, look at that cadillac! I bet that guy gets tons o' ass. He's cadillac pimpin'. I wish I had a cadillac.
Person2: Naw, man- he's cadilac shrimpin'. His girlfriend sucked my dick last night in my VW Rabbit. Maybe he should pimp harder.
Person1: What a sucka