MWF 

As in every other day of the week, excluding weekends. (Monday Wednesday Friday)

Dude, I've had so much homework to do this week. I swear, I've been at the library MWF!

MWF by TomReynolds May 30, 2005

mwf 

Married White Female
(Often used in personal ads onlne and in print, or in internet chat rooms)

MFW seeks open-minded companion.

mwf by visitingboston June 27, 2005

MWF 

The act of having sex in unearthly positions.

We were having sex in mwf

MWF by Bartholomew Esquire 3rd December 2, 2021

MWF 

Morning Wood Fantasy.
You know, when you wake up and you're horny and you jack off. The MWF is the thing you think about whilst you do it.

1: "Dude, I had the weirdest MWF this morning. In it, I was like--"
2: "Please, no. Shut up. Now."
1: "--and then she was rubbing whipped cream on my nipples.... dude, what are you doing?"
2 yanks a sign post out of the concrete and breaks in the front of 1's skull.
2: "SHUT UP!!!"

MWF by Relyxer January 7, 2006

MWF 

Militarily Weaponized Flatulence

Don’t go in Scott’s room, he’s launching some MWF in there.

MWF by Newsfguy2 January 6, 2022