1) any person who accepts everythingposted on Wikipedia as fact
2) especially any person who knows that anyone can post on there and still uses it as an attempted credible source
1) Josh- Yeah that's totally true. I read it on Wikipedia
Jane- Wikidiot (bad example, but it works)
2) Josh was such a Wikidiot that he used Wikipedia as a source in his thesis paper.
A user of a wiki, especially wikipedia who often change or eliminate articles, citing protocol and rules, often to the chagrin of others. Typically derogatory. (Portmanteau of "wiki" and "idiot")