Pseudo-Latin phrase meaning "out of the ass". Used to describe anything pulled or otherwise ejected out of one's ass.
Chase: Can you believe Steve's report?
Carol: I saw it and I don't believe it. Where'd he get those numbers?
Ted: I'd wager a little ex rectumis research.
by mcfm October 12, 2010
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A surgical procedure to cut the line running from a persons rectum to thier mouth to keep them from talking shit.
Guy1: Man, I got some BJ and P from Julie last night, blasted on her face, then I bolted like a skeet skeet bandit.
Guy2: Her mom is right behind you; you need an oral rectumy.
by Bill Hawko August 21, 2010
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To have anal sex inside a semi truck and orgasm so loud that you make a transforming sound
She orgasmed in the truck so loud that I thought she was transforming into Rectumis Prime
by Epilepto July 3, 2023
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