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1.
Crushed up doxycycline that is mixed with water and smoked off of tin foil for the crazy ass high it gives you.
"Dude, we smoked deko all fucking night. We were so brain dead in the morning."
by fdgfdsfr November 16, 2006
 
2.
look at
You see a nice looking Lady in the street and you say to your mate, "Take a deko at that"
by 47laddy December 29, 2013