Are you fronting?
"Casey drove around the rented car acting like it was hers. She was straight fronting"

As far as I understand 'fronting' is kind of like bragging.

Is this a word common or used widespread?

Question

Are you fronting?
"Casey drove around the rented car acting like it was hers. She was straight fronting"

As far as I understand  'fronting'  is kind of like bragging.

Is this a word common or used widespread?

Answer

It's more like bluffing and bragging. It's pretending to have or be something that you're really not, so you can look better than you really are.

It's older urban slang that was commonly used, but not as much anymore. It's pronounced without the "g" at the end.