Top Definition
Ghrelin is a hormone released by cells lining the stomach when hungry. Its levels peak before a eating and subside after a meal. It also sounds like a colloquial gerund, so use it like a verb and sound cool while being biochemically accurate, Foo'!
Brah, after surfing all morning, I'm totally ghrelin' for a burger
by Daerycke S April 23, 2008
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