Marabou (historically spelled marabout) describes a certain type of down feather trimming.
[2][3] "Marabout" was a very popular trimming from the late eighteenth century onwards.
[5] The Great Exhibition of 1851 prominently featured marabout alongside other feathers as second only in popularity to ostrich feathers, and it was noted that white marabout was sometimes very scarce, and also that some manufacturers were making highly commended items from turkey and goose-down.
The Metropolitan Museum states that 'no object better epitomizes the sex kitten glamour of the 1950s than the marabou mule.
'[6] Marabou mules are popularly associated with glamorous 1950s actresses such as Marilyn Monroe, who wore them in The Seven Year Itch.