Jive-ass
1. Is someone who thinks they're acting cool but is acting like a fool. See every depiction of a white person copying African American style or music for an example.

2. Insincere. Just fronting.

3. An object that is pretentious or over the top.

4. So "hip" that it isn't cool. Mass marketed, high fashion "cool". An object that is so "cool" it makes you lose street cred.
"You're just a jive-ass white boy, no cred."

"What is up with that jive-ass shirt?"

"Look at you, with your jive-ass lava lamp in your jive ass pad."