I'm just here for my cardio - what your brother says when your sister's boyfriend is about

what your brother says when your sister's boyfriend is about to get his face smashed by your big brother or your brother's friends

Bro, I'm just here for my cardio. I swear I didn't start this.

I'm just here for my cardio. You're gonna regret this.

I'm just here for my cardio. I don't even know why I came.