Forerly a diet cola this variation of Coke was modified by midwesterners much like coke and cherry coke to carry non-beverage like connotations. Diet Coke refers to something gay and is used as a tactful way of insult.
That pink and Purple Miata is Diet Coke. Those guys on queer eye are Diet Coke. That blonde spikey haircut of yours is diet coke.
by Nathan Voelker & Drew Fitch October 03, 2004
Imitation Coca-cola that has no sugar in it. Tastes okay, but is absolutely filled to the freaking brim with all sorts of chemicals that cause CANCER. (i.e. saccharin, aspartame) I swear, the entire diet coke generation is going to DIE when they are 40 years old of cancer.
Oh, you WANT cancer? Here, have a diet coke.
by w00tster January 05, 2005