Green’s Dictionary of Slang

1. a heavy user of marijuana.

1970

Current Sl. V:3.

2. a morphine or heroin addict.

1968		‘Sl. of Watts’ in Current Sl. III:2.
1975		E. Torres Carlito’s Way 74: The kid went straight like a fishhook. Can’t do nothing with a tecato.
1995		J. Stahl Permanent Midnight 91: It’s the funniest thing a tecato’s ever said.
c.2003		F.M. Figueroa ‘What The Soneros Are Saying’ at Picadillo.com 🌐 Here are a few additional drug-related terms that you may find in song lyrics: tecato – heroin addict.