2 definitions by Oxford and Cambridge dictionar

A monster living in the basement that eat toast off a dirty table during the pandemic. Only use to describe someone or something nasty disastrous and hopeless such as: that nigga mo down the street was horrendous he slept through the rough rough night in the cold.

It also describe someone that has dying passion about something useless or meaningless in life like fire force or arguing with kids on Instagram.
He: Have you heard the news yesterday ?

She: Yh, that nigga mo was so erratic he really ate a whole box of Krispy Kreme donuts.

Or…

He: Did you see Harry spent his 18th birthday sleeping under the bridge?

She: oh yeah! He such a nigga mo !
by Oxford and Cambridge dictionar November 9, 2021
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