More commonly known as a Hawaiian phrase meaning "hang loose", now used by wannabe Hawaiians that have only visited Hawaii once and think they are now, in fact, Hawaiian themselves by using the phrase. These people sometimes also think they are black along with Hawaiian which makes them furthermore retarded often using the racist slang "nigga" after the phrase.
Dude 1: Well I'm going to take off...
Dude 2: OK, shaka bra nigga!!!
Dude 1: Yeah, w/e...bye.
A term which is used by surfers, pot smokers, and everyone down.
The lifeguard said the rip current was bad and I shouldnt go in the water. I just ignored him and bumrushed the ocean yelling out, "shaka bra", because I was blunted!