Abbreviation for Dextromethorphan.

Chemical found in over the counter cough suppressants that when ingested in large quantities causes effects similar to tripping.
"Dude, I just at 500mgs of Dex!"
"Holy shit dude, you're going to be dexing for 8 hours straight."
"I'm going to be all dexed out, man!"
by obie December 20, 2003
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dex is a word used to describe a male who someone thinks are really hot or sexy
offt, look at him
by justbesexy May 24, 2009
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Lit: Exclamation to be said when having an orgasm.

Can replace words like "awesome" or "cool", implying that the object is so good it makes you orgasm.

Also can be used as a verb-to dex: to have an orgasm.
"Dude, check out that hot girl."
by Alex RR April 23, 2006
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Consuming Dextromethorphan (an ingredient in Vicks 44 and Robotussin max strength) for a strong, disassociative high that lasts all day, makes you see music, and slows down your perception of time. Also causes Robo-Walk in higher doses.
Shit man, drank that bottle of syrup now I'm dexxing.
by Lilsleepy September 13, 2013
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To consume so much DXM that you can no longer move comfortably. When you're dexing you usually can't feel your body or your visions will be completely double, or both.
I've only been dexing a few times but every time I have, it's made almost no sense. Once, my room felt like the size of a shoe box. Another time I went blind for a few seconds. The last time i went dexing, I went to the Rennaisance fair and thought I had traveled up a mountain and back in time when I was really just in a parking lot.
by 720mgSTEEEVE November 29, 2009
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