A prison inmate; generally speaking a nickname for a buddy (man or lady) which you went through lots with. noun.A plural of bimbo. 1. A dimwitted youthful woman.2. A dimwitted younger woman whom needs becoming forgiven for everything she does because she's 'cute', whether she's in reality attractive or not.Adaptation associated with the word bimbo. A slang term for a lady's vagina.