Swollen or fat vagina. Usually used as an insult.
"Oi, chubby muff!"
When one gets drinking alot and thinks their music is at a reasonable volume that won't upset their neighbors, roommates, etc, but is actually way too loud.
Raoul warned me several times to keep my music down, but I had the beer muffs on again last night and now I'm homeless again.
An alcohol induced condition of the ears in which members of the opposite sex sound sexy as hell. Usually accompanied by beer goggles and drunk dialing.
I had my beer muffs on last night when I called my friends ex. Her voice made me fill up a little bit.
Virtual ear muffs created by drinking lots of beer. Music and voices seem muffled and therefore less obnoxious, especially when generated by the person wearing the muffs. They also usually convince the wearer that their singing voice is far better than it actually is.
The neighbor's beer muffs convinced him that the music he was blasting and shrieking along to at 3 in the morning wasn't loud enough to bother anyone.
When you're drunk and find yourself dancing to top 40 songs that you normally hate. Similar to concept of beer goggles
Miley Cyrus sounds a lot better after a couple of drinks, when you have beer muffs
Normally a female has a manky muff caused by Stds / Stis by having unprotected sex
Dam that girl has a "Manky muff" she must have completed tinder/bado/snapchat