bucko

1. (also attributive) A boastful or bullying man.Examples: "A far cry from the miserable existance^([sic – meaning existence]) of the common sailor brought about by bucko mates and bible preaching captains on the large ocean-going vessels, life aboard a doghole wasn't for everyone and losing your ship on the rocks or being rolled like a cork on a big wave chased many back to the open sea with an indelible meaning of the expression 'doghole' forever stamped in their minds."; "And the poor spailpin fanach running like the devil, his clothes tearing on briars and brambles, and his feet soaking and dirty water running out of his boots, and the three big buckos giving him every dirty look if he fustered or faltered, looks that'd sour milk or peel paint from walls."alsoattributiveinformal