A phrase said, usually while gaming, but can be applied at any point in life, when one feels unstoppable or after achieving a difficult task.
Synonyms: Winning
In CS:GO, friends are playing. It gets down to 5 vs 1. The 1 makes an ace by killing all 5 opposing players. He shouts over the mic, "Ain't No Brakes on the Rape Train!!!"
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"