Top Definition
1. One who follows the guidelines, rules, and regulations of Mattitude; a Mattitude Follower.

2. A word used to censor yourself while trying to say "motherfucker".
1. Shannon Moore is an MF'er

2. I'm gonna kill that MF'er Johnny!
by Ryder October 09, 2003
3 more definitions
1. Mattitude Follower 2. mother fucker
by Kevin Counts March 26, 2003
short for mother fucker
He is such an incredible m-fer. I can't believe he talke to me like I was 8 years old.
by WordPak Revisited December 30, 2011
Military abbreviation for "My Friend."
Sgt. Connelly was one courageous MF'er.
by zabazuve-ha September 07, 2007

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