A cowardly or otherwise despicable person.
A wild dog native to Australia (Canis familiaris, Canis familiaris dingo, Canis dingo, or Canis lupus dingo).
A person who conforms to current opinions, especially for reasons of personal advantage; an opportunist.
A device, node or program that transmits the correct time to clients in a network.
Someone who performs a job for the required time only, making a minimum of effort.