(of the weather) unpleasantly warm and humid.
"it was a hot, very muggy evening"
Alternative word for Mugget (Mon Nugget)
"Ayy Mon got murked in phasmo again! Time to make some muggies!"
When you pore cream soda in a girls pussy so that it starts coming out her nose. Then you stick your dick in her nose to block the cream soda.
Jody: I just pulled a Dirty Muggie on Clarise last night, my dick was so sticky afterwards.
Peter: Sick bro!!