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1. Chin up
Keep a positive attitude
Don't be such a downer, keep the chin up.
2. Chin up
1) Oft used to reassure someone that things could be worse

2) Sometimes used as a mocking, smug phrase to annoy someone
"I notice that Liverpool lost tonight - chin up, Paul"
3. Chin up
Chin up is a phrase said to someone who has a desperately bad stroke of luck.

The phrase originated from when lanky blond people teased slighty retarded dark haired people for getting the answer to things wrong.
"I lost my phone! What the n*g*a am I gonna do?"

"Just keep that chin up!"
4. Chin up
Originated from the motion of sliding the back of your hand up your throat and doing a nice little flick at the end of the whole motion. Also known as fuck you.
Man: "Hey baby, wanna come over my house and bang?"
Woman: "Chin up!"
by Transcendent Nov 9, 2004 add a video
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