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1.
To perform a "deverill" is to take a course of action that is greatly misappropriate to the situation one finds themselves in.
Lauren: Dev raped me.
Sam: DEVERILL!
by No. 1 Rüdiger May 17, 2010
14 1
 
2.
Deverill is the act of gravely miscalculating the chances one would have of making it with the ladies. Such a mistake often occurs through excessive alcohol abuse or more simply being a peeny.
Wow did you just get with that lauren girl?
Nah i did a deverill...shes ran home...
13 1