Blain's signature mini gun from the classic sci/fi action movie Predator (1987). This can also refer to other memorable, badass weapons in movies and video games.
Blain - (Jesse Ventura): "Come on in you fuckers, Ol' Painless is waiting."
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guy 1: "Dude! you got a triple kill with that Spartan Laser!"
"Man, I can't be bothered to study for this test, I'll just write the answers on my forearm. So what if I get caught."
"Yeah man, suicide is painless."
An Adjective/Noun that means:
Lacking pain. If someone tells you something will be painless, they are likely lying, and the experience they are describing will usually be painful.
"Oh, come on! Getting stabbed with a 3-foot longneedle will be practically painless!"