noun. It's a convention. Or is it? Maybe it's a centaur.
Real citation: "jan 23. gone perform wit @deeITgurl at da celebrity convention-ma-bob- more details later, i cant wait !"
(Jan. 8, 2010, RudeBoipharaoh, Twitter, http://twitter.com/RudeBoipharaoh/statuses/7528960183)
Made-up citation: "I think I want to go to a Big Lebowski convention-ma-bob. I just need to get my bowling ball back from my S&M-obsessed gran-gran."