Used to describe big man boobs. This word originated from the phrase "Big Bouncers" when it got translated incorrectly. A common adverb to this would be, "jiggly", thus "jiggly mamoons".
Maimoona is a muslim girl who is the complete opposite of her religion. She will not smoke or drink but she will steal from a dollar store. She is completely her own self and she mixes her fashions. Also, she freaks out about things.
britt- "im gonna smoke this cigarette"
maimoona- "noooo! lets go tag a creek instead"