Pops when ease off throttle

[Pike]

I've found mine does it on the occasional short shift, make me grin every time 

[russ-vdub]

PS my car pops and bangs like a machine gun 

It's cos u in da hood sista  blap blap blap yeah!

Its brap! Not blap
Mannnn you're well not from da hood!

 

actually anyone will tell you it originate from the word "brat"... others have just become in use because ppl are stupid.