someone who has started as an apprentice of any genetal area and further his studies into the male genetalia. After several years of practice has passed the final exam and can now claim mastery of that region. Many 'cockmasters' have now opened their dojos in the Western parts of the US.
'Dan has been training since he's 5 to master male genetalia'
'He's not match for Andy...Andy has perfected his skills and is now a 'cockmaster'!!!