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the chemical found in cough medicidnes; short for dextromethorphan, the active ingredient in robitussin, dayquil, etc. When taken in large quantities, it makes you trip; cough syrup used to robo trip
by emshea April 04, 2010
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(Adj.) Used to describe someone who in your opinion is very cool or crazy.
"Hey, what do you think of Dan?"
"He's completely dexo!"
by gregk May 01, 2005
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