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3.
A mushroom shaped boil/wart on ones rump(ass). Known to puss and emmit other liquids causing the owner immense pain and suffering.
"OMFG did you the size of that guys mushrump?"
by George_midd May 18, 2007
5 9
 
1.
A mushroom shaped pillar of winter snow capped by a clod of dirt, a dead animal, or a piece of trash, left standing while snow around it melts away. The pillar gradually hollows but the top is the last to melt since it is protected by the detritus. They last but a short time and are a sure sign of Spring in Vermont.
In common usage in our region.
Combining form of
mushroom and stump perhaps rump

We took a Sunday drive today on the backroads and saw many well formed mushrumps, including one capped by a skunk, priceless.
by Daniel Wetmore April 03, 2008
13 5
 
2.
A mushroom shaped pillar of winter snow capped by a clod of dirt, a dead animal, or a piece of trash, left standing while snow around it melts away. The pillar gradually hollows but the top is the last to melt since it is protected by the detritus. They last but a short time and are a sure sign of Spring in Vermont.
In common usage in our region.
Combining form of
mushroom and stump perhaps rump
We took a Sunday drive today on the backroads and saw many well formed mushrumps, including one capped by a skunk, priceless.
by Daniel Wetmore April 01, 2008
5 5
 
4.
mushroom like boil or spot located on the rump.
Holy shit, george has got a mushrump!!!!!
by tom04939204 May 18, 2007
1 6