dago /ˈdeɪɡəʊ/ noun4 •(US, offensive) A person of Italian descent. •(offensive, old-fashioned) A person of Southern European descent.Oh, well, I didn’t really do anything this time. Just pulled the Dago out of the river. Like all Dagos, he couldn’t swim. — 1925 •(offensive, rare) A Catholic. •(offensive, no longer used) A crewman who speaks Spanish, Portuguese, or Italian.I interviewed his aid to know what the Dago's rank was (Sailors call everybody that speaks Spanish, Italian, and Portuguese, Dagos) — 1878 formsdagoes · dagos