1 definition by Mrommel
A Mu male is an average male who is just a nobody: in fact, on the sentimental and sexual radar of women, he doesn't even exist. He's that kind of gray, shy, low-key man that has been around in the office for years but who is so insignificant that no one ever remembers his name.
John brought a cake for everybody at the office, but everyone thought it was Susan's for he's such a Mu Male.
by Mrommel August 10, 2021