- The definition of a bucko is a bossy person.
An example of bucko is someone who rudely tells others what to do.
nounpl. buck·oes or buck·os
- A blustering or bossy person.
- Irish A young man; a lad.
Origin of buckoAlteration of buck1.
(plural buckos or buckoes)
- young lad; friend, pal (used in addressing someone)