Lock In

Alright listen up, you cotton-headed ninny muggins. This here meme is about that feeling when you gotta commit to something, like when you're about to do something risky. The pic shows a dude gritting his teeth and saying "Lock in!" It's a way of saying you're going all in. No thinking, just doing. It's often used in situations where people are about to do something kinda dumb but they want to look like they're serious.