This guy knows what I'm talking about 

An expression used to diffuse responsibility for an unpopular statement made in a public setting. Typically used to imply complicity or collusion on the part of an unwilling stranger.

You: I mean, really, who hasn't made out with a rundown fat chick in a moment of drunken desperation.

Crowd: *silence*

You: *smile and point to a random guy in the crowd* This guy knows what I'm talking about.

This guy knows what I'm talking about by Ggggggaaaaaaaaaaaaaaaa March 22, 2009