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Definition funny of Cheesemaster:
Homaosexual male who enjoys performing fellation upon uncircusised males, preferably with poor personal hygiene.
"Cyril is such a cheese master - He needs a mouthwash"
Being excessively cheap, mainly used as slang for the beastmaster in war3:tft or anything else that is perceived as overpowered.
That beastmaster was such a cheesemaster before they nerfed him.