A feather in your cap

English idiomatic phrase

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 headgear 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 plucking off 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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