b.y.f.a
a way to tell someone you're gonna make them look like a mess
You better bring your A-game or I'm gonna b. y. f. a you in the gym.
He said he'd beat my fu**n ass, so I showed up with a backpack full of snacks.
She texted me, 'Don't even think about skipping this match, or I'll b. y. f. a you in front of your mom.'