I'll slam ya uncle - You boast that you're so strong, you can beat someone and th

You boast that you're so strong, you can beat someone and their uncle, like they’re both losers and you’re the greatest.

I'll slam ya uncle and he'll get a black eye and a bruised ego.

You're not even in my league, I'll slam ya uncle and he'll run away.

I'll slam ya uncle and then I'll take your lunch money.