To describe an object as being indestructible, to never stop working, or to outperform other similar products.

when you got that sauce that's lookin extra fire.

To be able to withstand the negative emotional/mental aspects of the life; includes relationships, friends, family and all drama in general. Best known by La Roux's song of the same name.

Having sufficient accrued corporate pension (usually near retirement age) that you can say & do whatever you like.

to be able to drink shot after shot of anything for a significant amount of time and not throw up

Bulletproof is a means of keeping files from being deleted, like when you go to a website to download a link and find that the link is dead. When you have a "Bulletproof" file what you have is a file that cannot be deleted by anyone, or any government because it is now a torrent. Free to be posted in all countries with no fear of being deleted because they are hosted in countries like China, Serbia, Russia or other free countries without reservation for the whole world to see and obtain.

50 Cents (Curtis Jackson) attempt to get into the PC Game market, the game is called "50 Cent: Bulletproof". A pathetic game where you play 50 Cent and the other G-unit members to kill "bad guys". Not exactly a bestseller... If you have played the game you know why