a cousin eddie
A cousin eddie is when you’re having sex from behind and you slip it in their ass like it’s a surprise party they didn’t know was coming.
He slipped it in her ass like it was a surprise party. She screamed so loud the neighbors came out.
He did a cousin eddie and it was so sudden she almost fell off the bed.
He slipped it in her ass and said, ‘Surprise, shitter’s full!’ I almost laughed myself to death.