When a person (usually male) becomes very grumpy when hungry aka The Grungers!
Ooh he's a bad mood wonder whats up...

Don't worry he's got the GRUNGERS, hasn't had breakfast, tut,tut
by Curlypineapple January 17, 2012
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If you listen to Nirvana or Skinyard you are a grunger
by FortunateSon92 April 12, 2015
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a grunger who works in an office by day and a punk rocker by night
man, Amy is a sexy office grunger!
by grunger 101 October 26, 2011
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