Commonly misinterpreted to describe a homosexual. A 'cockmaster' is actually one who through much training, has mastered the art of seduction. A true 'cockmaster' will be promiscuous and seldom pleasure the same girl twice. Although he may leave broken hearts in his wake, the 'cockmaster' will have no regrets, will never apologise and never look back.
"Mate, did you see that stunner that Duncan shagged last night? He is such a cockmaster"