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Commonly used to describe a dog owner in a derogatory term. Usually used in dog hate communities like r/DogFree and r/DogFreeHumor.
These muttnuts keep ruining my day with their ugly beasts!
Muttnut by PizzaWriter September 15, 2025
Related Words

muttutter 

Large breasts on a dogly female.
That sickening female had massive muttutters.
muttutter by Chodester July 16, 2003
Haircut for a 🐕
I think it's time your dog gets a muttcut
Muttcut by pjmorand September 23, 2018
Gooning in a very dark, hot, and humid environment. Typical at exactly 3:33 a.m. after consuming the among us potion.
Hey bruh you trynna mustnut tonight.

Oh hell yeah bruh. *Ambient fuckboy noises*
mustnut by IIV KURO VII July 3, 2024
Oiled up masterbation in a dark, hot, and humid environment. Typically at 3:33 a.m. after drinking the amung us potion.
You bruh you trynna mustnut tonight?

Oh hell yuh bruh you know I'm down *ambient fuckboy noises.*
mustnut by IIV KURO VII July 3, 2024