The term best boy is commonly referred to the Electric Guitarist of popular Korean rock band, Jae (Park Jaehyung) of Day6, who debuted with Congratulations in 2015.
by FULLWOON November 29, 2020
Get the Best Boymug. Jang Dong Il (D1) from Boygroup DKB is the defintion of BEST BOY, and if you have watched Peak Time, then you know why
by DKB_BEST_BOYS March 9, 2023
Get the BEST BOYmug. 
A phrase to describe a strawberry roan horse. Who behaves like an angel and is an absolute legend. Such a horse should be treated like the king he is.
by Spidersno1fan December 14, 2020
Get the best boy spidermug. October 9th is National Boy Best Friend Appreciation Day. make sure you go the extra mile to show your appreciation and be extra nice to him all day
Boy bestfriend: why are you being so nice to me today?
You: because it’s National Boy Best friend Appreciation day :)
You: because it’s National Boy Best friend Appreciation day :)
by Thegreatest1973 October 8, 2023
Get the National Boy Best Friend Appreciation Daymug. 