This link is to surfing terms in Spanish: http://www.sayulitasurfhotel.com/spanish_surf_terms.html and UrbanDictionary says "surfo" is Costarican slang for a cool guy: What a surfo! = He surfs really well.

Hola Erjk! In Venezuela we have several words that have similar meanings: "Pana" (a really close friend), "hermano". And even though it's an insult, "marico" is widely used in Venezuela between young persons to refer to each other without being considered as an insult. Hope this helps :-)

En México entre los jóvenes utilizamos muchas palabras como lo son "wey", "camarada", "vato",

hombre / colega / vato(Méx) /

Dario is right, in is Spain: tío. In latin america, I would say the closest translation is 'amigo' or 'hermano' (brother, like what's up bro?) I have never been surrounded by surfers, but I'm quite sure that I heard them using 'bro', or 'brother', literally and exactly as it is in English (Anglicism). Take care, Alejo.