Definition of "mong"

mong¹

/ˈmʌŋ/

noun
plural mongs
1. (dialect) A mingling, mixture, or crowd.
2. (dialect) A muddle or confusion.

mong²

/ˈmʌŋ/

noun
plural mongs
1. (Australia, slang) A mongrel dog.
  Quotations
  Some blue cattle-dogs and a small pack of mongs barked excitedly, and danced round, and wished they knew what to do in such an unheard-of situation; and no doubt dreamed for days after of what they had done to distinguish themselves.
  1965, Brian James, The Big Burn: Short Stories‎, page 40

mong³

/mɒŋ/

noun
plural mongs
1. (British, Ireland, slang, offensive, derogatory, dated) A person with Down's syndrome.
2. (British, Ireland, slang, offensive, derogatory) A stupid person.
  Quotations
  Can't you see you don't belong / You're a stupid little fucking mong
  2016 May 5, “Thinking He's Hard (Little T Reply)”, performed by Soph Aspin

mong⁴

/mʌŋ/

preposition
1. (obsolete) Alternative form of 'mong.

mong⁵

noun
1. Alternative form of mueang