Stands for Little Douchey Fag Man. Most likely associated with jerks that blow you off or your ex boyfriend that broke up with you for absolutely no reason.
That jerk that blows you off is a LDFM. His is a Fag, acts like a Douche, and probably has a Little penis.
by XoMs.RightXo July 26, 2011
Get the LDFMmug.