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Wiktionary
show off

n. (alternative form of show-off English) vb. 1 (context transitive idiomatic English) To exhibit the best attributes of something. 2 (context transitive and intransitive idiomatic English) To attract attention to for the purpose of bragging or personal exhibitionism; to demonstrate a skill, talent or property for the purpose of bragging or personal exhibitionism.

WordNet
show off

v. display proudly; act ostentatiously or pretentiously; "he showed off his new sports car" [syn: flaunt, flash, ostentate, swank]