The Surra de Bunda is a dance move by the group Tequileiras do Funk, from São José dos Campos, São Paulo, Brazil, which involves a female dancer "beating" her buttocks into a man's face, potentially leading to concussion.
[1][2] The phrase Surra de Bunda in Brazilian Portuguese loosely means "butt beat", "butt pounding" or, more accurately, "punishment by ass".
Some individuals enjoy the punishment, whilst others cry in misery.
[1][3] During the groups' performance, male audience members are invited onto the stage, and will sit down onto a chair placed on the floor of the stage in front of the audience.
At this point, the dancers will begin to slam the male's face into their buttocks along with the rhythm of the music playing.