The Portuguese word for "claws" is "garra", which also can be interpreted as determination. So, if a person has "garra" (determination), this person is normally recognized as tough, strong, etc.

Bear with me, and now, there is a car, made by Renault called LOGAN. Yeah, it is actually a vehicle originaly designed in Romenia by Dacia, a company that was bought by Renault few years back. And now, Renault sells Logan cars in Brazil.

And then, there relased a movie...

The image is circulating on Facebook in Brazil for a while and says:

"This father, who sells comic books to support his daughter was beaten by 3 men. Share this post and Facebook will donate R$ 0,50. Lets help. This is a men with "garra" (Determination, but they really mean claws). Leave your Amem. OBS.: When 50k posts shared is reached Renault of Brazil will donate a LOGAN so the father can take his daugther to School.".

Sorry for explaining the joke. I thought it was a funny good example of Brazilian humor (aka HuE BR).