1. A unit of cultural information, such as a cultural practice or idea, that is transmitted verbally or by repeated action from one mind to another.
2. Richard Dawkins’s 1976 coinage, on the analogy to gene (with a little aid from mime and mimic), for a cultural copying unit, such as the word or melody that is mimicked by others.
3. Stupid **** that unfunny people on the internet repeat ad nauseum in a feeble attempt at humor (See: LOLCats).