Yahoo/yeaho - Crack Cocaine
Yale - Crack Cocaine
Yayoo - Crack Cocaine
Yeah-O - Crack Cocaine
Yeh - Marijuana
Yellow - LSD; depressants
Yellow bam - Methamphetamine
Yellow bullets - Depressants
Yellow dimples - LSD
Yellow fever - PCP
Yellow jackets - Depressants
Yellow powder - Methamphetamine
Yellow submarine - Marijuana
Yellow Sunshine - LSD
Yen pop - Marijuana
Yen Shee - Suey Opium wine
Yen sleep - Restless, drowsy state after LSD use
Yeo - Crack
Yeola - Marijuana and crack
Yerba (Spanish) - Marijuana
Yerba mala (Spanish) - PCP and marijuana
Yerhia - Marijuana
Yesca - Marijuana
Yesco - Marijuana
Yeyo (Spanish) - Cocaine, Spanish term
Yimyom - Crack Cocaine
Ying Yang - LSD