O - Opium
O.J. - Marijuana
O.P. - Opium
O.P.P. - PCP
O.Z. - One ounce of a drug substance
Octane - PCP laced with gasoline
Ogoy - Heroin
Oil - Heroin; PCP
Old Steve - Heroin
On a mission - Searching for crack and/or being high on crack
On a trip - Under the influence of drugs
On ice - In jail
On the bricks - Walking the streets
On the nod - Under the influence of narcotics or depressant
One and one - To inhale cocaine
One and Ones - Talwin and ritalin combination is injected and produces an effect similar to the effect of heroin mixed with cocaine.
One on one house - Where cocaine and heroin can be purchased
One plus one sales - Selling cocaine and heroin together
One tissue box - 1 ounce of crack
One way - LSD
One-fifty-one - Crack; crack sprinkled on tobacco
One-stop shop - Place where more than one drug is sold
Onion - 1 oz. of crack cocaine
Oolies - Marijuana cigarettes laced with crack
Ope - Opium
Optical illusions - LSD
Orange barrels - LSD
Orange crystal - PCP
Orange cubes - LSD
Orange haze - LSD
Orange line - Heroin
Orange micro - LSD
Orange wedges - LSD
Oranges - Amphetamine
Organic quaalude - Gamma hydroxybutyrate (GHB)
Outerlimits - Crack and LSD
Owsley - LSD
Owsley's acid - LSD
Oxicotten - A semi-synthetic opiate
Oxy - OxyContin
Oxy 80's - A semi-synthetic opiate
Oxycet - A semi-synthetic opiate
Oxycotton - OxyContin
Oyster stew - Cocaine
Oz - Inhalants
Ozone - Marijuana, PCP and crack cigarette; marijuana cigarette; PCP