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To cut the sleeves off of a t-shirt, invented by Chachi, thus raising your cool factor by several points.
I was going to throw that old t-shirt away but I decided to chachinate it instead so I can look super cool.

Dude, you totally chachinated that shirt - I wish I was as cool as you!
by Capt. Underpants September 23, 2007

Words related to chachinate

chachi chachie fonzie happy days joanie