Top definition
To be innocently treated like poop because someone is in a bad mood. (Verb) Similar to being "dumped" on with a grumpy flair.
Stop grumping on me, it's not my fault Natasha ate your waffle!

Being grumped on, is just not fair.
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2
Thousands of women have been grumped over the years, but only a few dozen have complained about it. Women love Trump!
by swetepete October 13, 2016
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3
To have been put in a bad or grumpy mood by an outside force. When for whatever reason things in your environment have pissed you off.
"For fuck's sake you are in a bad mood, who grumped you?"
by Byetor May 13, 2016
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