to smoke marijuana/weed. originated in manchester, uk. specific to junglist movement.
who's up for a ten-ninty-nine (1099)?
he is currently involved in ten-ninty-nice (1099)
by junglist666 January 24, 2010
A police code bastardization, meaning taking drugs whilst on duty.
PC: "Receiving, over. I'll be there in a bit. I'm currently involved in a 10-99."

Radio: "You jammy bastard..."
by matt_dawg February 04, 2009

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