An alcohol that doesn't give a positive breath test. Often used to drink and drive.
The policeman gave him a breath test because he had passed out from alcohol poisoning, but the test was negative. He must have been drinking tertiary alcohol.
Where you go after the secondary location. The third part of a weekend bar crawl that begins with a power brunch and ends when better judgment kicks in.
Steve: Anybody down to go somewhere else?
Vivica: Are you thinking what I'm thinking?
Both: Tertiary location!
Basically, a woman’s asshole or anus may serve to be her third input, or tertiary orifice. A woman, being master of her own body, may deem whatever orifices she has to be primary, secondary or tertiary as she seems fit. For this definition, we have chosen the brown-eye.
“Annabel was both eager and anxious for me to ram my wad into her tertiary orifice. Sod.”