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1.
Drug heavily used in some Middle-Eastern and African countries. Consumed either through chewing the leaf like coca-leaves or brewed as tea after being dried. Results in feeling of euphoria and increased concentration (used by many students for "studying" purposes). Resembles caffeine, but is illegal in the US. However, no one cares.
"... when they're all fucked up on khat..." - Black Hawk Down
by opelwerk July 24, 2005
 
2.
Khat is a stimulant with similar effects to amphetamine. It is a leaf which is chewed over a number of hours.

Chewing it can make people feel more alert and talkative.
It can also suppress the appetite.
Although it's a stimulant, many users report a feeling of calm if it's chewed over a few hours. Some describe it as being 'blissed out'.
Khat is not an illegal substance in the UK, but it is in many other countries.
by a7x rules August 05, 2006
 
3.
adj. bengali term for something that is very lame
dude that movie was so khat
by ar1k November 23, 2008
 
4.
a Ciggarette...
yo lets go bun this khat pon da river and bun sum weed pon de banks
by Van July 14, 2003