To rub somebody's head rapidly.
My brother bunda'd me.
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A big bunda is when a girl has a nice shaped ass- That one dude on beta squad
That girl got bare bunda you know
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It is used to define a person who is extremely black.
This boy is bundas
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the other meaning of bum or arse but in a bigger size that catches people's attention
"ayo bro look at the gyal of dem sides"
"BROSKIII SHE HAS BUNDAA COMING IN BIG AND ROUND"