A phrase used when you are having a conversation with someone (usually a friend), and the other person is being a complete dumbass
and doesn't understand what you're talking about, even though its completely understandable... But then they finally get it.
John: Hey, where were you today?
Sam: I was home sick...
John: Oh where were you? I didn't know you were on vacation!
Sam: I'm at home. Sick. Dumbass
John: Oh!! You're home.. and you're sick. Sucks man!
Sam: Go get 'em tiger...