the idea of simply being better, often used synonymously with skill issue
"I'm having trouble with my squat form bro. How do I keep my back straight?"
"Gap."
To beat someone in a drag race (usually referencing a street race) by a large margin
Guy1: look at that civic
Guy2: hold on im going to gap this ricer
Oh man, I slept with this nasty chick last night. She had a real Gap!
short text story
random person: hey girl you lookin fine
another random person: gap!!