M0
Nickname given mostly to a cool-headed male who never loses his cool or patience. This person can be relied on at anytime, and is willing to help out or give advice when needed. The M stands for mad, and the zero standing for how often he/she gets angered. This person has often showed no signs of cracking under pressure, and always making the call he/she believes to best fit the situation.
Bro: Dude! My girlfriend just tried to stab me!
Dude: Holy shit man! You need to talk to M0! He helped me ask out that hot cheerleader!
by TheeNicknamedefiner June 03, 2014

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