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1.
WEC
A MMA (Mixed Martial Arts) company.

WEC means: World Extreme Cagefighting.
An example of WEC (World Extreme Cagefighting) is:

UFC (Ultimate Fighting Championships), SF (StrikeForce), and PrideFC (Pride Fighting Championships).
by HeavyMetalHearted July 24, 2010
 
2.
WEC
Stands for Waffle Eating Cunt. Defines anyone from Belgium who regularly pisses you off or acts like an idiot.
Person 1: Did you talk to that ass from Brussels at the party last night?
Person 2: Yeah, what a complete and utter WEC
by gribblefritz December 07, 2009