1. If you're a female, a Tastee is another female friend that is particularly down for anything. She is one of your most fun, care-free and spontaneous friends.
2. When out in a public place, a Tastee can be an attractive individual of the opposite sex (or same sex, depending on what you're into) across the bar.
3. As this is the most commonly used version of the term, this is the definition people use to describe someone they are consistently hooking up with but not officially dating. After an introduction of "Tastee", it's then universally known by everyone that you're together, but not "together". If the relationship progresses even further to an exclusive dating relationship, that person is no longer a Tastee, but rather a girlfriend/boyfriend. As current dating trends show people are seeing each other more casually, this term is perfect for describing a relationship in its infancy without putting pressure on it.
Definition 2: "Hey, LJ, look at that Tastee across the bar over there." "Oh, yeah, he is pretty Tastee."
Definition 3: "Hey, everyone, this is my Tastee, LJ. We started hanging out 3 weeks ago."