M - Marijuana; morphine
M&M - Depressants
M.J. - Marijuana
M.O. - Marijuana
M.S. - Morphine
M.U. - Marijuana
Ma'a - Crack cocaine (Samoan)
Machinery - Marijuana
Macon - Marijuana
Maconha - Marijuana
Mad dog - PCP
Madman - PCP
Mafu (Spanish) - Marijuana
Magic - PCP
Magic dust - PCP
Magic mushroom - Psilocybin/psilocin
Magic smoke - Marijuana
Mainline - To inject a drug
Mainliner - Person who injects into the vein
Make up - Need to find more drugs
Mama coca - Cocaine
Manhattan silver - Marijuana
Manteca (Spanish) - Heroin
MAO - Amphetamines; methylenedioxymethamphetamine (MDMA)
Marathons - Amphetamine
Marching dust - Cocaine
Marching powder - Cocaine
Mari - Marijuana cigarette
Marimba (Spanish) - Marijuana
Marshmallow reds - Depressants
Mary - Marijuana
Mary and Johnny - Marijuana
Mary Ann - Marijuana
Mary Jane - Marijuana
Mary Jonas - Marijuana
Mary Warner - Marijuana
Mary Weaver - Marijuana
Maserati - Crack pipe made from a plastic rum bottle and a rubber sparkplug cover
Matchbox - 1/4 ounce of marijuana or 6 marijuana cigarettes
Matsakow - Heroin
Maui wauie - Marijuana from Hawaii
Maui-wowie - Marijuana; methamphetamine
Max - Gamma hydroxybutyrate dissolved in water and mixed with amphetamines
Maxibolin - Oral steroids
Mayo - Cocaine; heroin
MDM - Methylenedioxymethamphetamine (MDMA)
MDMA - Methylenedioxymethamphetamine
Mean green - PCP
Medusa - Inhalants
Meg - Marijuana
Megg - Marijuana cigarette
Meggie - Marijuana
Mellow yellow - LSD
Merchandise - Drugs
Merck - Cocaine
Merk - Cocaine
Mesc - Mescaline
Mescal - Mescaline
Mese - Mescaline
Messorole - Marijuana
Meth - Methamphetamine
Meth head - Methamphetamine regular user
Meth monster - One who has a violent reaction to methamphetamine
Meth speed ball - Methamphetamine combined with heroin
Methatriol - Injectable steroids
Methedrine - Amphetamines; methylenedioxymethamphetamine (MDMA)
Methlies - Quik Methamphetamine
Methyltestosterone - Oral steroids
Mexican brown - Marijuana; heroin
Mexican crack - Methamphetamine with the appearance of crack; methamphetamine
Mexican green - Marijuana
Mexican horse - Heroin
Mexican locoweed - Marijuana
Mexican mud - Heroin
Mexican mushrooms - Psilocybin/psilocin
Mexican red - Marijuana
Mexican reds - Depressants
Mexican speedballs - Crack and methamphetamine
Mexican valium - Rohypnol
Mezc - Mescaline
MFT - Nexus
Mickey Finn - Depressants
Mickey's - Depressant; LSD
Microdot - LSD
Midnight oil - Opium
Mighty Joe Young - Depressants
Mighty mezz - Marijuana cigarette
Mighty Quinn - LSD
Mind detergent - LSD
Mini beans - Amphetamine; methylenedioxymethamphetamine (MDMA)
Minibennie - Amphetamine
Mint leaf - PCP
Mint weed - PCP
Mira (Spanish) - Opium
Miss - To inject a drug
Miss Emma - Morphine
Missile basing - Crack liquid and PCP
Mission - Trip out of the crackhouse to obtain crack
Mist - PCP; crack smoke in the bottom of a glass pipe
Mister blue - Morphine
Mix - A term used to refer to cocaine or a drug environment
Mixed jive - Crack Cocaine
Mo - Marijuana
Modams - Marijuana
Mohasky - Marijuana
Mohasty - Marijuana
Mojo - Cocaine; heroin
Monkey - Cigarette made from cocaine paste and tobacco; drug dependency; heroin
Monkey dust - PCP
Monkey tranquilizer - PCP
Monoamine oxidase - Amphetamine; methylenedioxymethamphetamine (MDMA)
Monos (Spanish) - Cigarette made from cocaine paste and tobacco
Monster - Cocaine
Monte - Marijuana from South America
Mooca/moocah - Marijuana
Moon - Mescaline
Moon gas - Inhalants
Moonrock - Crack mixed with heroin
Mooster - Marijuana
Moota/mutah - Marijuana
Mooters - Marijuana cigarette
Mootie - Marijuana
Mootos - Marijuana
Mor a grifa - Marijuana
More - PCP
Morf - Morphine
Morning shot - Amphetamine; methylenedioxymethamphetamine (MDMA)
Morning wake-up - First blast of crack from the pipe Morotgara Heroin
Morpho - Morophine
Mortal combat - High potency heroin
Mosquitos - Cocaine
Mota/moto (Spanish) - Marijuana
Mother - Marijuana
Mother's little helper - Depressants
Motorcycle crack - Methamphetamine
Mouth worker - One who takes drugs orally
Movie star drug - Cocaine
Mow the grass - To smoke marijuana
Mu Marijuana - Mud Heroin; opium
Muggie - Marijuana
Muggle - Marijuana
Muggles - Marijuana
Mujer (Spanish) - Cocaine
Mule - Carrier of drugs
Murder One - Heroin and cocaine
Murotugora - Heroin
Mushrooms - Psilocybin/psilocin
Musk - Psilocybin/psilocin
Muta - Marijuana
Mutha - Marijuana
Muzzle - Heroin