Top definition
A generaly large man who generally belives he is an esence of awesome or the best in the world.Besides the great height other things that define a CM Niall would be that they generally have either a scragly beard or a trimmed one, they can also have short hair slicked back or long greasy hair that hangs over their face. After a CM Niall defeats his oponent he will strike a greatness pose to show dominence.CM Niall has some sort of afiliation with the red star faction.
Woman 1: look at that giant guy

Woman 2: well he must be a CM niall cause hes striking the greatness pose over there
by megatroll75 June 02, 2012
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