Factory - Place where drugs are packaged, diluted, or manufactured
Fake STP - PCP
Fall - Arrested
Fallbrook redhair - Marijuana, term from Fallbrook, CA
Famous dimes - Crack Cocaine
Fantasia - Dimethyltryptamine
Fantasy - Gamma hydroxybutyrate (GHB)
Fastin - Amphetamine; methylenedioxymethamphetamine (MDMA)
Fat bags - Crack Cocaine
Fatty - Marijuana cigarette
Feed bag - Container for marijuana
Feeling - Marijuana
Feenin - Behavior associated with a person craving cocaine or other addictive substances when they are unavailable
Felix the Cat - LSD
Ferry dust - Heroin
Fi-do-nie - Opium
Fields - LSD
Fiend - Someone who smokes marijuana alone
Fifteen cents - $15 worth of drugs
Fifty-one - Crack; crack sprinkled on tobacco
Finajet/finaject - Veterinary steroids
Fine stuff - Marijuana
Finger - Marijuana cigarette
Finger lid - Marijuana
Fir - Marijuana
Fire - Crack and methamphetamine; to inject a drug
Fire it up - To smoke marijuana
Firewater - GBL-containing product
First line - Morphine
Fish scales - Crack Cocaine
Five C note - $500 bill
Five cent bag - $5 worth of drugs
Five dollar bag - $50 worth of drugs
Five-way - Combines snorting of heroin, cocaine, methamphetamine, ground up flunitrazepam pills, and drinking alcohol
Fives - Amphetamine
Fix - To inject a drug
Fizzies - Methadone
Flag - Appearance of blood in the vein
Flake - Cocaine
Flakes - PCP
Flame cooking - Smoking cocaine base by putting the pipe over a stove flame
Flamethrowers - Cigarette laced with cocaine and heroin; heroin, cocaine and tobacco
Flash - LSD; the rush of cocaine injection
Flat blues - LSD
Flat chunks - Crack cut with benzocaine
Flatliners - 4-methylthioamphetamine
Flea powder - Low purity heroin
Flex - Fake crack (rock cocaine)
Florida snow - Cocaine
Flower - Marijuana
Flower flipping - Ecstasy (MDMA) mixed with mushrooms
Flower tops - Marijuana
Fly Mexican airlines - To smoke marijuana
Flying - Under the influence of drugs
Foil - Heroin
Following that cloud - Searching for drugs
Foo Foo - Cocaine
Foo foo stuff - Heroin; cocaine
Foo-foo dust - Cocaine
Foolish powder - Cocaine; heroin
Footballs - Amphetamine
Forget me drug - Rohypnol
Forget pill - Rohypnol
Forget-me pill - Rohypnol
Forwards - Amphetamine
Fraho/frajo - Marijuana
Freebase - To smoke cocaine; Crack Cocaine
Freebasing - Smoking crack cocaine
Freeze - Cocaine; renege on a drug deal
French blue - Amphetamine
French fries - Crack Cocaine
Fresh - PCP
Friend - Fentanyl
Fries - Crack Cocaine
Frios (Spanish) - Marijuana laced with PCP
Frisco special - Cocaine, heroin, and LSD
Frisco speedball - Cocaine, heroin, and a dash of LSD
Friskie powder - Cocaine
Fry - Marijuana cigarettes dipped in embalming fluid, sometimes also laced with PCP; Crack Cocaine
Fry daddy - Crack and marijuana; cigarette laced with crack; marijuana joint laced with crack
Fry sticks - Marijuana cigarettes dipped in embalming fluid, sometimes also laced with PCP
Fu - Marijuana
Fuel - Marijuana mixed with insecticides; PCP
Fuete - Hypodermic needle
Fuma - D'Angola (Portugese) Marijuana
Furra - Heroin