Top Definition
A friend you can always count on .
"It was two in the morn, I ran I out gas and she got me, she is a Mighty Mo ! "
by tjadie December 13, 2012
1 more definition
A reliable friend who never lets you down.
Can't afford anything for themselves but asks you what you want for Christmas? Mighty Mo!
by RottinaB December 13, 2012

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