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1.
When a person acts like they are too cool to talk to you. Dismissive, aloof and arrogant.
I went up to say 'Hi' to Rob and he totally Cool Guyed me. He thinks he is all that and a bag of chips.
by cdale27 February 14, 2012
 
2.
When a well liked guy tells you he'll call you right back, or he will contact you in some form very soon and doesn't.
During Conversation:

Guy1- "Let me call you right back dude."
Guy2- "Alright. No problem."

After 5 Minutes or So:

Guy2- (exhales deeply) "I just got coolguyed."
by theethan July 15, 2009