Tending to brag about accomplishments or qualities in an annoying or excessive way.
From Middle English 'boast' (to talk with excessive pride), origin unclear but possibly from Old Norse 'bast' or related to Scandinavian words meaning 'to threaten'. The suffix '-ful' indicates fullness of the quality.
Studies show that boastful people are actually perceived as less competent and less likeable—paradoxically, genuine achievement is more impressive when you let others discover it rather than announcing it yourself.
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