I call shenanagins - You say ‘I call shenanagins’ when you're tired of the nonsen

You say ‘I call shenanagins’ when you're tired of the nonsense and you're ready to fight.

My brother said he can do 100 push-ups, but I call shenanagins.

My crush said he’s going to propose, but I call shenanagins.

My dad said he’s going to retire, but I call shenanagins.