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..."