A muck ring is the ring of shit that forms around a penis during anal sex. A Felcher is one who felches. Therefore an MRLF is someone that felches and licks the muck ring off of penises
by torrK October 14, 2008

Dave: Bobby, since you wouldn't make me a brew its Time To Chuck My Muck Over Your Sister's Jubblies
by Greg_the_Smeg February 7, 2019

by Cnhausctky February 28, 2022

by A DAWG’S LANGUAGE December 14, 2020

Use widely in the north of England as a another word for poo, shit but it can also refer to mud or dirt.
I’m going for a muck.
Look at you! You’re covered in muck.
You’ve walked muck all into the lounge carpet!
Look at you! You’re covered in muck.
You’ve walked muck all into the lounge carpet!
by NorthernSillyMonkey November 25, 2020

Redditor 1: muck
Redditor 2: muck
Redditor 3 :muck
Redditor 4: muck
Redditor 5: muck
Redditor 6: muck
And so on, so forth
Redditor 2: muck
Redditor 3 :muck
Redditor 4: muck
Redditor 5: muck
Redditor 6: muck
And so on, so forth
by Nightskyflyer January 1, 2022

by Wordsmithingtonburger April 8, 2022
