Verb. to conversation hijack, as in stealing a conversation, changing the subject, and not allowing anyone else to speak. Other forms of the word include conjacker, conjackee, and conjaction.
Will: My best friend just found out his gf has been cheating on him for a month with a guy from VCU...
Gabe: Oh my gosh dude I'm so--
Brian: I know a kid from VCU, we grew up together in New Hampshire, we were on the same soccer team, and this one game...
Will: Goddamit Brian conjacked me again!