I want to be your backdoor man - Trying to shove your junk into someone else's junk while the

Trying to shove your junk into someone else's junk while they're still attached to their main lover.

My cousin tried to be my backdoor man while I was still dating his sister. It didn’t end well.

He said he’d be my backdoor man if I let him borrow my car. I said no.

My backdoor man wanted to be my main man. I told him to pick a side.