Top definition
To be so tired that it would seem to others that you are, in a sense, high. Most commonly happens late at night, and symptoms include random bursts of laughter and well, other stuff people do when there high.
Jacob-hehehehe look at that door, its so, white and beautiful.
John-ya jacob, u a little night high or what?
by JakeC August 16, 2007
Mug icon

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the shirt
2
The physical and/or mental state in the very late hours where you are tired and not in control or just not caring about what you say or do. Easily avoided by going to sleep or drinking excess amounts of high caffine products.
Last night John was speaking nonsense about some magic unicorn steal his lucky charms??!

Oh he musta had a night high...he shouldnt stay up so late.
by SHADY225 June 02, 2009
Mug icon

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the shirt
3
When everything is funny.. usually using motion lotion.. blow up dolls.. right hand.. etc.. fone sex.. ne thing funny .. nothing on tv up late.. nothing to watch and its funny
im so nighthigh i can actually see stars while you are standing out side
whoa.. i see purple cows.. kuew.. "ehe..ehehe ahahah!!!"
by [ Deejay La0ziE ] Jimmy April 18, 2003
Mug icon

Golden Shower Plush

He's warmer than you think.

Buy the plush
4
When your always hyper at night time. When your jittery, like you just ate a bunch of sugar.
You: OMGOMGOMG
Friend: Your night high bro.
by KJo990 November 11, 2012
Mug icon

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the shirt
5
A certain time of night when a person becomes so tired that they begin to show symptoms of a person on drugs.
Jessi, it's a little early for you to be having a night high!

Bro you're night high is kicking in.
by Mykawh March 02, 2016
Mug icon

The Urban Dictionary Mug

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

Buy the mug