Slang: Jane Doe

Definition: An unidentified woman.

Example: 1) The police found Jane Doe number 1 buried under a blanket in the back yard.

Definition: The average American woman.

Example: 1) Jane Doe spends most of her time shopping for the latest fashions.

Etymology: This is the female version of 'John Doe', which has been used for hundreds of years to refer to a typical, average man, particularly in legal cases or in reference to unidentified dead bodies. Both 'Jane' and 'John' are very common names.

fonte: www.peakenglish.com