cubemaster
Someone who is a master of cubes. Whether the cubes in question are Rubik's Cubes, Game Cubes, Game Cube Games, or cubicles, someone somewhere is the master of one.
"conor is the cubemaster. he can solve a Rubik's cube in 36 seconds. What a stud."
"Young grasshopper, you suck at smashbros but if you study under me you eventually will become the cubemaster."
"Young grasshopper, you suck at smashbros but if you study under me you eventually will become the cubemaster."