Top definition
A person who is always negative and looks constipated in appearance. Nothing makes them happy. You will notice that people avoid them like their attitude is contagious.
Grumungeon:
Any person of any age who can not be happy, EVER, in any circumstance.

Today my (husband or wife) got a raise at work and still a sour puss, such a grumungeon...
While at the bar a couple is being served an awesome appetizer with an amazing presentation, they look like someon died....such a couple of grumungeons.....
After meeting someone for the first time and they practically vomit nothing but negative conversation, "that dude is such a grumungeon"
by Calibrisella June 18, 2017
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