A handshake that transitions into a hug-like, semi-embrace that lasts no more than one second and may be accompanied by a firm slap on the back. An acceptable way for one guy to show appreciation for another male friend.
Before leaving the party, Cowboy saidgoodbye to The Shankster and gave him a Man Hug.
When a heterosexual man has intense admiration for another man, to the point that it seems like sexual attraction (but it's not). This is usually a submissive-dominant relationship, since the person with the man crush will usually do or say anything to win the respect of (or a high-five from) the crushee.
Person 1: Jay's not here, he's off playing one-on-one basketball with Frank.