look up any word, like bootylicious:
1. nup
nup - (1) interjection (2)adjective:

1. Negative, no, to convey disagreeance.
2. Gives the subject a bad characteristic, feeling or appearance.
In the case of (2) this is a contextual word, ie: the use of the words around it define the exact meaning of nup.

Examples:
"You're nup" - The person you are saying this to is in some way undesirable, or is saying/performing/has performed something undesirable.
"Nup. This is nup." - Use of both word types is achieved here. The first occurance (1) showing disagreeance to something, followed by (2) to show that "this" is "nup" or undesirable.
by Cabji Aug 3, 2003 add a video
2. Nup
1)A word said to someone who has either said or done something stupid, gay, ridiculous or asks a question already answered multiple times.

2)Expression of disbelief, usually over something too good to be true.

Can be described as another way of saying 'get out'.
1)Person1: These four lokos taste soooo good its like an orgasm in the mouth.
Person2: Ok NUPPP

2) Person1: I drank 6 four lokos, 24 beers and was only buzzed last night.
Person2: Nup
3. nup
short for a button-up shirt. commonly plaid but can be any pattern. a tool to make the average person more attractive
"oh my god that guy looks so hot in the nup. I bet it's flannel"
4. Nup
A third nipple, someone likely to have a third nipple. It can be any part of speech.
Nup! I spilled coffee on myself!
5. nUp
chUcks bowl
wheres nUp?
by chUck Apr 7, 2003 add a video
rss and gcal