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!"
a very nasty looking pussy.
Dan: dude i ate that chick out it was fucking groose.
Tim: dude that was a cow touge i hit that today.
TIM and Dan: aaaaahhhhhhh
A term used meaning very beastly at something. Not to get it confused with raunchy.
Man that guy is runchie at volleyball.
a person who can't be trusted.
i'm telling you chick, that rutt can't be trusted!!