A naval slang term for washing powder. Or used to confuse some average idiot into believing your talking about drugs.
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Scouse: Hey Geordie, I'm putting a wash on, got any spare dhobi dust?

Geordie: Yeah, in the box by the sink.

Scouse: Oh no, thats not biological!

Geordie: Shut up you poof!
by chindelly April 14, 2010
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