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2.
Derv- 1 A person who is very unreliable, untrustworthy.

2 A person who always rips people off; usually on drugs
Yo fool you need some nug?
Fuck you Derv!
by Streetratderv April 07, 2010
4 11
 
1.
Diesel fuel intended for use in road vehicles and taxed accordingly. British English. Pronounced "durv" to rhyme with curve. Originally an acronym for Diesel Engined Road Vehicle.

Background: Diesel fuel in Britain is supplied in two forms, derv for road vehicles, and cheaper, lower-taxed "gas oil" or "red diesel" for boats, generators, agricultural equipment, construction plant and other non-road use. The two forms are coloured and chemically tagged to enable inspectors to distinguish between them. The tags can be detected in *extremely* small concentrations, and the use of gas-oil in a road vehicle is an offence punishable with *very* heavy fines (Hell hath no fury like a government denied tax revenue).
The price of a gallon of derv has gone up again.
by RB1956 March 25, 2008
35 11
 
3.
dartford slang for crap morrocan hash
i rather go without
by les nolan December 28, 2003
3 25