look up any word, like donkey punch:
 
1.
replying to the first post in a forum thread without reading any of its replies by other users. the idea being to give responses which are not influenced by well-known posters.
Gruncher:
*grunching* In my opinion, that's a poor reason not to vote.
by sgrrman February 16, 2008
 
2.
to give up on anything without any good reason at all. To basically be a giant pussy.
Tim: I didn't use that free trip to Europe because I might of had to work
Tim's Friend: Well your fucking "grunching" that aren't you
by boogerlips March 23, 2010