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A more emphatic way of saying "again". Combines the phrases "one more time" and "again".
"That movie was so good I want to see it one mo' gain!!"

"I know you didn't just say that to me -- repeat yourself one mo' gain...."
by VaNellie August 24, 2005

Words related to one mo' gain

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to do something one more time-the act of repeating an action in a derogatory sense. Usually used in a threating manner
"Call me an asshole one mo gain and see what happens"
by pfcbenji April 18, 2009
one more time; again, another time
let me hit that onemogain
by pete zahut November 26, 2005