definition 1- someone who steals your trail mix
definition 2- AKA mastercunt, known as the biggest cunt ever
definition 3- someone who spills beer on your DDR Pad, and masturbates with your favorite shirt, while watching colbert report
damn, i was trying to fuck this girl then i found out she was a cuntmaster, oh my god.
One who is mastered at the art of cunninglus or female genital stimulation.
That boy who fingered me last night made me come in 3 minutes; he was a real cuntmaster!