Verb:
To search for any subject on Wikipedia prior to researching via a reliable source.
Also see wikiwacked.
Descriptive:
Of someone who's information is consistantly of low or suspect quality.
Eg: "Don't listen to that guy. He is totally wikiwacked!
If you don't really care about the validity of the info in your dissertation, just wikiwack the subject!
Wikiwalking is a speed game which two or more people can play on Wikipedia. They choose a start page and an ending page. The first one to the final page wins that round, and normally you play the best two out of three.