MTFN 

A man with three first names

Mr. Michael Colin George is a MAN with THREE FIRST NAMES (MTFN), and can't be trusted.

MTFN by CIMHsv September 13, 2018

MTFN 

Make The Fucking Number

"I LOVE working for my company! Their only expectation is that I MTFN."

MTFN by Syd Walker-Hudson January 13, 2010