Had to be there
It came from some dumb social media guy who thought they were a genius. It means 'Because I had to.' Like, why else would you do that? It’s the worst excuse ever.
My friend said 'I had to post that video' because he thought he was cool.
My mom said 'I had to call my sister' because she was being annoying.
My teacher said 'I had to give me a detention' because I was being too loud.