2. (pronoun): A womanizer that is ten times cooler then you could ever hope to be, and can make love to your girlfriend and talk you out of doing what he just did, and will make love to your girlfriend, and talk you out of doing what he just did.
3. (adjective): Extremely cool, radical, amazing.
2. Do you see Mick over there lying naked in bed with Tony's girlfriend and Darek's Mom? He is the fucking GUY!
3. Did you hear that? That guitar solo Aaron just played was fucking GUY!