'jail bird' definitions:

Definition of 'jail bird'

From: WordNet
noun
A criminal who has been jailed repeatedly [syn: jail bird, jailbird, gaolbird]

Definition of 'jail bird'

From: GCIDE
  • jailbird \jail"bird`\, jail bird \jail" bird`\ A prisoner; one is in prison or who has been confined in prison. [Slang] [PJC]