look up any word, like cleveland steamer:
 
1.
Brand of chocolate milk. Found only in Saskatchewan, Canada.
Hey, I'm thirsty. I think I'll chug back a glass of vico. (another word only known to superior intellects of Saskatchewan)
by Brian and Becca August 30, 2006
 
2.
A brand of chocolate milk.

The term is often used by residents of the Canadian province of Saskatchewan as a synonym for "chocolate milk".

Vi-co was first sold in western Canada in the 1950's. For most of the product's life, it was marketed by Co-op Dairies / Dairy Producers. The Vi-co name was abolished when that company was purchased by Dairyland in 1995.
Can I get a cheeseburger and a Vi-co?
by sferris March 16, 2007