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1.
A boutineer is a floral decoration worn by men, typically a single flower or bud.

It is a flower on the lapel of a jacket.
It is worn on the left lapel of a men’s suit, sport jacket, or blazer jacket; it can also be worn on an overcoat.

The boutonniere is always attached above a man’s heart, and it should be worn in the lapel’s button-hole.
I need a boutineer for the wedding bro.
by Ashton June 26, 2014