Used in the same sense as the word "hilarious," only when something is immensely funny. The "Hima-" prefix comes from the Himalayan Mountains, which are large.

Can also be used sarcastically.

Original creator is Mike from Blockbuster.
Person A: What do you call a seagull over the Chesapeake?
Person B: I am not sure, what?
Person A: A BAY-gull! Ahahaha Bagels!
Person B: Oh boy that was himalarious.

(to those who aren't sure, there's a large body of water basically splitting Maryland in half known as the Chesapeake Bay)
by Briack May 17, 2007
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