What is Bullet-proof?
1.
Having sufficient accrued corporate pension (usually near retirement age) that you can say & do whatever you like.
John told his manager to go fuck himself - he's bullet-proof
See
2.
Going downstairs in the middle of the night to get a drink only to find your father and his buddies circle-jerking to the movie "Willow"...and it doesn't phase you.
Yo, I heard about your dad beating off to a picture of Gary Coleman at work and getting caught by his boss. If that shit don't fuck you off, you must be bullet-proof, man.
