cock; (un carajo) shit (US), jackshit (US), sod all (UK), bugger all (UK); (al carajo) hell; crow's nest
“No importa ser inteligente si tienes grande el carajo.” — Being smart doesn't matter if you have a big dick.
Synonyms: amigo, badajo, bicho, cabeza de papa, cabezón, callampa, carajo, chile
The etymology is uncertain, but the most plausible source on the basis of both semantics and historical phonology appears to be unattested Vulgar Latin *c(h)araculum (“stick, rod”), which would have been a Latinized diminutive of Ancient Greek χάραξ (khárax, “stick”), whence also χαρακτήρ (kharaktḗr). Certain cognates include Portuguese caralho, Galician carallo and Catalan carall. Some claim that attempts to attribute Italian cazzo, with the same meaning, to the same etymon fail on phonological