A fork of Rural Dictionary
Someone who is grumpy and collects a lot of grump to dump on you. Has the negative connotations of the similarly pronounced "cum dumpster". They have grump all over their faces.
I wasn't trained in my job correctly and now all these grump dumpsters are coming down on me.
To Pump a Grump, is to take a massive shit.
I ate 12 tacos, and that night i had to pump a grump.
Usually not a morning person. A grump fuck will wake up and walk straight to the coffee pot with a pinched face of discomfort due to the fact that a grump fuck is very unhappy to be out of bed. Grump fucks are not restricted to morning hours only, grump fuckieness can happen at all hours of the day. See also bitchead.
Sometimes when I wake up in the morning I look in the mirror and realize I look like a real grump fuck.
Daniel Avidan of the game grumps
In the game grumps intro Danny usually says "I'm not so grumps".
When a male has a very big erection in a public place that won't go away and creates a lot of frustration, in turn it causes him to hit someone or something out of sheer anger.
"In 1st period today I had the biggest stiff grump that I hit michelle Because she was the closest thing to hit."
The behavior of an inconsolable cat. Includes; flagrant mewing, flopping, and head butting. Cat may also repeatedly try to step on your computer keyboard or put his paw in your water glass.
I can't study with this grump bucket cat on my desk!