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Monogamous Friends with Benefits. .
So you're having sex with a friend but only that one friend. Generally this is an agreed upon situation by one married person and one single person. The married person may or may not be having sex with their spouse. The single person feels better if it's M-FWB. Otherwise, they'll assume you're banging half the city.
"I'm having sex with Cindy from accounting"
"She knows your married, right?"
"Yeah, it's a MFWB thing so she's cool with it"
mfwb by I won't tell. March 30, 2018
Words you can keep
Made Fart With Butt. The act of making a fart with one’s butt.
As the terrible aroma began to fill the room, it became abundantly clear that Alex had indeed MFWB (Made Fart With Butt).
MFWB by Dr. Corn September 5, 2021
Related Words
When you "Make Fart With Butt".
I MFWB'd so hard next to that girl.
MFWB by jakegrealg July 30, 2020
More from Urban Dictionary

Salad Days 

green inexperienced youthful judgement and cold blooded execution of those judgements.

Rashness with little concern of consequence.

Antony and Cleopatra. William Shakespeare

"My salad days,
When I was green in judgment, cold in blood."

- William Shakespeare, Antony and Cleopatra, 1.5
"How did you end up in jail?"

"Salad days, 'nuf said."
Salad Days by GilbyRFC0 October 7, 2011
Word of the Day on August 28, 2026

age gate 

An absolutely foolproof way to keep minors from viewing content deemed "too mature" for them to watch.
Billy: "So I was trying to watch some videos for an M rated game, and I ran into an age gate, so I put in my real birthday. SOMEHOW it managed to figure out that I am 12. CURSE YOU AGE GATE!!!"

Bill: "Fucking age gate! *quick scroll* THERE! I was born on January 1, 1904. Fuck you age gate."
age gate by Banja January 7, 2011
Word of the Day on August 27, 2026

board chow 

A)
The Crud that collects under the keys in a keyboard. Usually more severe in the keyboards of programmers and webmasters as they tend to spend a lot of time at the the computer and thus eat at their desk. Mainly affecting IBM Model M (clicly) style boards.

B)
Can also be used to gross out Non-Techie people
A)
Bill: want to go to the club?
Bob: No, I've got to clean out my board chow, keys are starting to stick.

B)
Bill: Want to go out to get a bite?
Bob: No, i am just going to have some of my board chow/
Bill: Whats' that?
Bob: The food scraps that collect in my keyboard; Want some?
Bill: *GAG* *HURL* *GAG*
board chow by BinaryHackerMan September 3, 2007
Word of the Day on August 26, 2026

young pup 

a young person, a young adult in their late teens/early 20s.
Ah, you're just a young pup at 23!
young pup by the dog May 30, 2006
Word of the Day on August 25, 2026
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