mwtf 

A simple acronym for:

Man, Whut the Fuck?

Most commonly used online.

Friend 1: I heard your girl was cheating on you last nite!
Friend 2: MWTF!?

mwtf by Mystik V July 29, 2008

MWTF 

Putting an M in front of any cuss abbreviations implies it's the Mormon version and not a real cuss where in this case F means fudge

@apple MWTF did you do to my gun emoji with the last update?!

MWTF by BlueMormongirl April 6, 2017

MWTFRUOA 

An acronym which stands for, "Mate, what the fuck are you (RU) on about????" It originates from the Impossible Creatures Hive forums.

Person 1: Hello, do you prefer flapjacks or french toast when you are in the coal mine?

Person 2: MWTFRUOA

MWTFRUOA by I AM NOT A TUBA PLAYER June 17, 2010