When someone interrupts you and changes the subject, disrupting your train of thought.
Guy #1: I was watching true blood last night...
Guy #2: Yeah, Jessica Alba was hot in X-Men!
Guy #1: Jessica Alba was in fantastic four! Anna Paquin was in X-Men.
Guy #2: I love Michael Chiklis in The Shield.
Guy #1: What was I talking about?
Guy #2: True Blood.
Guy #1: Quit cogblocking me dude.
by CaptainCogBlock September 02, 2009

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