a prank
A prank is when you say gross stuff to someone while recording them and then yell 'it's a prank, bro' when they lose their mind.
I told my mom I was going to die and that she was the cause of it, and then I played it back to her when she was cooking.
I said my teacher was a fat chicken and then played it back to her in front of the whole class.
I told my dad I was going to move out and then I played it back to him when he was eating pizza.