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1.
Slang word used in the context of hating someone or just to show stupidity; a donkey of sorts.
God, Darshan, you are such a dersh.
de The Studio 1 mars 2010
 
2.
to smack into a large inanimate object, such as a tree. Like shwapp
I didn't even see the tree when my forehead dershed it.
de superpants 15 mars 2005