If you see this in a recipe, it stands for Milk Fat, the fatty portion of milk. Milk and cream are commonly sold based on the amount of milkfat they contain.
by TheFlo June 13, 2015

an abbreviation used for "multifactorial" to describe when there are many issues/problems/things in your life that are contributing to your current emotional status.
Friend 1: "Hey! How are you?"
Friend 2: "Not too good, actually".
Friend 1: "What's the problem?"
Friend 2: "It's MF".
Friend 1: "Oh, I'm sorry!"
Friend 2: "Not too good, actually".
Friend 1: "What's the problem?"
Friend 2: "It's MF".
Friend 1: "Oh, I'm sorry!"
by cyyy May 23, 2010

abreviation for "mutual friend"
by williamshithead4357 November 27, 2020

by HappyApple(: November 10, 2009

by carrotcarrotcake January 13, 2021

Pronounced "oomph" as a pun, MF is an abbreviation for Modafinil, an anti-narcoleptic drug sometimes used as a study aid.
by jardox February 27, 2009
