Top Definition
When you stay up until around 3am or more in the morning and can't think straight and saying random things.
It was 4am in the morning and I was on a nighttime high so I started saying random stuff.
by Zongy January 05, 2009

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a state of mind in which you are so deprived of sleep that you attain a feeling of high much like marajuana.
Resulting in, but not limited to; thinking everything is excesively hilarious when in reality it is not or, acting like an idiot while half way between sleep and awake.
"It's 5 in the morning and brent just tried to jump off the roof, that guy must have a serious night-time high to pull that crazy shit!!"
by TheChosenOne599 June 30, 2009

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The Urban Dictionary Mug

Lotsa space for your liquids.

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Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt