A cowardly or otherwise despicable person.
A wild dog native to Australia (Canis familiaris, Canis familiaris dingo, Canis dingo, or Canis lupus dingo).
A contemptible or unpleasant person.
An ugly person.
An amphibian, a kind of frog (order Anura) with shorter hindlegs and a drier, wartier skin, many in family Bufonidae.
To expel (a user) permanently from a MUD or similar system, so that their account is deleted.