Feather Hat Pin
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From Wikipedia -
The term a feather in your cap is an English idiomatic phrase believed to have derived from the general custom in some cultures,
of a warrior adding a new feather to their head-gear for every enemy slain,
or in other cases from the custom of establishing the success of a hunter as being the first to bag a game bird
by the plucking of the feathers of that prey and placing them in the hat band.
The phrase today has altered to a more peaceful allusion, where it is used to refer to any laudable success or achievement
by an individual that may help that person in the future.
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As I've neither hunted men nor fowl, I guess my hats' feathers are strictly for the birds.