Urban Dictionary

A person that spends a keen amount of attention and energy on knowing the ingredients of food, the proper preparation of food, and finds great enjoyment in top-notch ingredients and exemplary preparation.
A foodie is not necessarily a food snob, only enjoying delicacies and/or food items difficult to obtain and/or expensive foods; though, that is a variety of foodie.

a style of writing that uses only lower-case letters.

n. Muffling out an interlocutor by slowly - yet unexpectedly - turning away their cranium with the palm of your hand. Can be construed as either playful or patently insolent by the receiving end.

1.verb: to show someone (or thing) that they are wrong or that they do poorly in reference to a specific field through punishment or humiliation

A saying used to ignore and disregard a comment or an insult when you can't think of a way to counter it. When this phrase is used, it is customary to raise your hand, palm facing out, and place it almost touching your adversary's face. This can make even the most civil person raging mad. Another variation is "talk to the hand 'cause the face don't give a damn'." I really did not know that people still said this.

The term used by marketing people to describe potential buyers of old-age.

The degree of familiarity with another person, which, if you chance to encounter them on the street, will determine if you merely greet them in passing or stop to talk.