Unknown; originally pejorative, it replaced the native word can. Perhaps from a call used for dogs (compare Galician apurrar (“set the dogs on”)). Another theory derives it from Iberian.
perro m (feminine perra, masculine plural perros, feminine plural perras)
- doggy, doggish
- wicked, mean
perro m (plural perros, feminine singular perra, feminine plural perras)
Related terms 
See also