A way of fooling or tricking someone that you cool with them, as you would reach out and act like you giving them a high five or genuine handshake but pull back and laughing at their expense.
First Guy: "yeah man, we cool. Give me some dab."
Second guy reaches out to dab his fist.
First Guy: (pulling his hand back) "Thought you had a friend." (Turns to laugh at his expense)
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