bucko adjective & noun.
['bʌkǝʊ] Nautical slang. Pl. of noun
-o(e)s.
L19.[from BUCK noun1 + -O.](A person who is) swaggering or domineering.
Comb.:
bucko mate an officer who drives the crew by bullying methods.
[TahlilGaran] English Dictionary ▲