(adjective - slang) - a person, thing or event that is disappointing, frustrating, unappealing, a bummer, a real downer; something that is not classic. Such as: "That movie was diet."
(Note: this
definition, though inadvertently, was taken from Coca-Cola's choice of branding for its regular soda, Coca-Cola Classic, and it's Diet Coke. See example.)
synonyms: nasty, terrible, awful,
lame.
antonym: classic, as such: "classic is good, diet is bad"; fly;
sweet
Daytona Beach, FL;
summer, 1987:
During the unloading of a delivery truck, most of a stack of Coca-Cola soda cans crashed to the floor in the back of a grocery store after being hit by an arriving, full palette of other goods. One store worker, trying to save surviving cases of cans from the carnage, took a lot of soda spray to his clothes, eyeglasses and
skin.
A coworker, just arriving on the scene and comprehending the accident, joked, "
Wow, that was classic."
"Nope," replied the worker, looking at his wet,
sticky work clothes. "It was diet. It was definitely not classic."
Realizing the double entendre, a slang term was born (at least in those parts).