Top Definition
MNF
An abbreviation for Monday Night Football on ABC.
The Rams play the Seahawks in a divisional matchup on MNF.
by Seye November 22, 2003
1 more definition
MNF
Must Not Fap. When seeing hot photos/videos of someone
Ohgad she pm'd me... MNF!
by jopx December 05, 2014

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