JMF 

Noun: Janky Muther Fucker. A person or business or retailer that aims to supplant, ruin, undermine, or negatively impact your brand, business or standing so they can get ahead. How do these people or businesses do this? They have no qualms misrepresenting you. They source, sell or represent you, your brand or your products in a self serving manner. Their goal is not to partner, but to put you out of business. Synonym: trainshipper, anti-partnership, unethical, dirty, douche canoe, bad people, bad business practices, dicks!

"We can't sell our stuff there, they are a bunch of JMFs." Or, "Do your homework, that retailer might be a JMF." Or "Did you see what that Janky Muther Fucker did in Greece? He just screwed you, royally."

JMF by Chrisdels January 5, 2015

JMF 

Judgemental Mother Fucker

That girl is such a JMF, coming into our house and constantly complaining that our place isn't how she wants it.

JMF by Mike the LCB October 3, 2011

JMFK 

n. "Just my fucking kidneys"
Derived by accident from the term coined in 2010, "Just my fucking kidding"
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JMFK can mean an array of different things, but is usually used in a situation that "just kidding" or "holy shit" would have sufficed, but the user really wanted to impress that other girl in the room and went balls-out.
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As the kidneys are a vital organ in most life forms on this planet, it makes absolutely no sense in this phrase. Use it wisely.

"Wow, I'm so glad we spent 10 minutes of our life submerged in a pretend submarine in disneyland!"

"JMFK, guys. Really."

JMFK by The beginning of time February 22, 2010

jmfcst 

A sort of religious crazy. Commonly found in Texas, and a major faction of the Republican Party. A jmfcst will, oddly enough, be strongly attracted to black girls, regardless of age, figure, or personality.

Example 1: "Hey, look at the jmfcst over there, preaching on the corner!"

Example 2: "Damn, I hope no black girls show up. That jmfcst may go wild."

jmfcst by Prometheus-Willkie November 8, 2012

JMFC 

One of the baddest mother fuckers you will ever meet, niggas wanna be him, haters can’t see him, every trap rap song was written for him.

Dude1–Did you see that dude get thrown out the club last night for throwing too much money on the strippers?

Dude2–What a JMFC!

JMFC by Slamberjay August 4, 2018

jmfk 

Just Mother F****** Kidding! The love child of the popularjk and mf

This acronym is so cool...jmfk!

jmfk by JRich1 January 21, 2009

JMFO 

abbreviation: Just My Fucking Opinion.

What I said in the boards was JMFO. Nothing more.

JMFO by ichigo January 13, 2005