Top Definition
Arising from a wasted slurring of the two wonderful words "rug muncher", a runcher is someone who devours something with the voracity of a lesbian on heat piling mouth first into pussy.

Related to the mysterious and as yet undefined "duncher"...
"Yo, you are a such a fucking runcher!"
"He runched that down"
"Im so goddamn runchy today!"
by JM 2201 February 12, 2006

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