Someone heavily inclined to vomit, usually from alcohol. To be a true Puke-asaurus rex the person must vomit on so many things that onlookers might find themselves impressed with both the breadth, color, and quantity or said vomiter.
"Ashlee, you are a Puke-asaurus rex, you projectile vomited on yourself, your bed sheets, comforter, bed spread, mattress, box spring, floor, and yourself. Maybe you should lay off anything cranberry and wear a bib for a while..."
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