I ain't make no jugface - You're saying you didn't do it and you're so sure of it that

You're saying you didn't do it and you're so sure of it that you might punch someone if they don't believe you.

I ain't make no jugface, I'd punch you if I did!

I ain't make no jugface, I was too busy being right!

I ain't make no jugface, I didn't even know what a jugface was.