Synonymous to 'rage'.
Hence, to 'Rob' is to rage, and gives rise to such terms as 'Rob quitting' and 'ROB ROB ROB ROB'
Rob: "Guys, I'm not in the mood"
Someone Else: "That's what she said"
Rob: "That's it, I'm out."
*Server: Rob has left the server*
Someone Else: "Dude awesome he just Rob quit.