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1.
A person who can jovially make anything mundane (and possibly life-threatening) sound extremely interesting.

Possibly an alien.
Chok: "Hey guys have you heard about this rash I have? It's shaped like a christmas tree and it started growing on my back and branches out! omg! check it out it even has a wiki page! my doctor totally directed me to it, cool beans right?..."
by lamp April 28, 2012
 
2.
means more,much,many in turkish
chok giuzel baksana...
by Brand February 06, 2005
 
3.
Anus
"They did it up the chok"
by KatYip69 November 10, 2013