fact me! - The final kick in the nuts you give your opponent to prove y

The final kick in the nuts you give your opponent to prove you're the only one with a brain.

'Fact me! You're still eating pizza for breakfast? You're a loser.'

'Fact me! You failed math twice. I aced it with my eyes closed.'

'Fact me! You said you'd be here at 8. It's 9 and you're still sleeping.'