fish ball cat 

In brazilian portuguese, fish ball cat sounds like "Fiz boquete"
and the translation just means "I did a blowjob"
when you are young at school you learn simple words as cat, dog, ball, fish, duck...

So people made that playing words to prank their friends

how do you say (peixe) in English? Fish
and (Bola) ? Ball
and (gato) ? cat

now repeat all together : fish ball cat - fiz boquete

fish ball cat by Carioca133 April 29, 2016

fish ball cat 

Apparently, according to the Brazilian funk song "Aula de Inglês" "fish ball cat" means fellatio.
"Fish ball cat", when spoken by a Carioca sounds like "fiz ballcatch" which means "I did 'ballcatch'". This apparently means the speaker sucked a dick, caught a "ball"

O quê que é peixe?
É fish.
O quê que é bola?
É ball.
O quê que é gato?
É cat.
Fish ball cat.

fish ball cat by Edgard July 31, 2006