It's a word you give to a person if he/she wants to take revenge on things that are goverment-based and illy run. a male hopai's roar is defined by a loud M16 like sound, which is likely to frighten away cool-minded little roachers when they least expect it (or when they're acting "cool").

A Hopai's prey is little lump-legged rap-loving third formers. Hopai's natural enermy is a Mrs. Burrows. She shoots sharp lawsuit papers out of her anus to catch her prey. Unfortunaly when it comes to catching a Hopai there's hardly any success, as the Hopai is very fast.
There has only been one Hopai that has ever existed. He goes by the code-name "Lance" or "Hopai".
by Craig March 17, 2004
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You slept with Hopay that dirty coon ass hoe. Your dick is gonna fall off
by Gbaby223323 December 31, 2011
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