Acronym of tactical air command.
"After spending hours at the park, he finally decided to tac out of his friend's party early due to a sudden headache."
A kind of customary payment by a tenant.
The drug cannabis.
In plain English: A tac is an old-fashioned slang term for a cigarette, though it's rarely used today.
"He had to stop his conversation with that loud, obnoxious tac in his ear."
Usage: This term refers to an old-fashioned rent paid in goods rather than money and is rarely used in modern everyday speech. You will typically encounter it only when reading historical documents or discussing traditional agricultural tenancy systems.
Abbreviation of Tacoma.
"The weather forecast for Tac showed rain moving in later today."