Blowhard
来自Big Physics
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wiktionary
blow + hard
etymonline
blowhard (n.)
also blow-hard, "blustering person," 1840, a sailor's word (from 1790 as a nickname for a sailor), perhaps originally a reference to weather and not primarily meaning "braggart;" from blow (v.1) + hard (adv.). An adjective sense of "boastful" appeared c. 1855, and may be a separate formation leading to a modified noun use.
