trash-talking

or trash talk

[ trash-taw-king or trash-tawk ]
/ ˈtræʃˌtɔ kɪŋ or ˈtræʃˌtɔk /

noun

disparaging or boastful language used especially to demoralize or intimidate opponents: trash-talking in the locker room.

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Origin of trash-talking

An Americanism dating back to 1985–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for trash-talking