Definition of "bimbo"

Anyway, to make a long, dull story even duller, I come from a time when a guy like me used to come into a joint like this and pick up a young chick like you and… call her a ‘bimbo’.]

[1972, Bernardo Bertolucci, Franco Arcalli, Last Tango in Paris, spoken by Paul (Marlon Brando)

A bimbo is a woman who is not pretty enough to be a model, not smart enough to be an actress, and not nice enough to be a poisonous snake.

a. 1992, P. J. O’Rourke, a sketch

[Tina] Fey […] makes hay with the thought processes of a purebred bimbo: […]

2004 May 3, Anthony Lane, “Looney Tunes”, in The New Yorker‎

And one had to remember that most of the bimbos to whom Roberta Wickham had been giving the bird through the years had been of the huntin', shootin' and fishin' type, fellows who had more or less shot their bolt after saying 'Eh, what?' and slapping their leg with a hunting crop.

1960, P. G. Wodehouse, Jeeves in the Offing, chapter III

Isn't he the bimbo who took the bread out of the mouths of the Thursday Review people? Chuck the blighter out of the window and we want to see him bounce.

1960, P. G. Wodehouse, Jeeves in the Offing, chapter XIII