I'll pee your pants
You’re so angry you tell someone you’re gonna make their pants wet with pee. It’s the most basic form of disrespect.
Your brother stole your last chip. You yell, 'I'll pee your pants!' and eat the whole bag.
Your teacher gave you a D. You say, 'I'll pee your pants!' and draw a f***ing big D on the board.
Your crush ignored you. You whisper, 'I'll pee your pants!' and walk away.