Brazilian bikini 

An extremely hot style of bikinis or bathing suits where the bottoms are shaped to show off as much of your ass as possible.
Very popular in Brazil and Hawaii.

"I really need to get a good tan on my butt"
"You should borrow one of my Brazilian bikini's"

Brazilian bikini by poke squid? December 25, 2006

Brazilian bikini 

A style of bikini made popular in Brazil that is designed to only cover 1/3 of the buttocks and to expose the rest.

Is that beach babe wearing a Berrydog Brazilian Bikini?

Brazilian bikini by designer92109 November 22, 2015