best man

US /ˌbest ˈmæn/
UK /ˌbest ˈmæn/
"best man" picture
1.

ベストマン, 介添人

a male friend or relative who attends the bridegroom at a wedding, and is usually his chief attendant

:
My brother asked me to be his best man at his wedding.
兄は結婚式で私にベストマンになってくれるように頼んだ。
The best man gave a funny speech at the reception.
ベストマンは披露宴で面白いスピーチをした。