noun
rustic samurai; boorish samurai
A derogatory term for a samurai who is seen as uncultured, provincial, or lacking refinement. Often used in historical or period contexts.
時代劇で、芋侍と馬鹿にされる場面がある。
In period dramas, there are scenes where someone is mocked as a rustic samurai.
田舎侍 also means 'country samurai' but is more neutral, simply indicating a samurai from the countryside, while 芋侍 carries a stronger derogatory nuance of boorishness.
Compound of 芋 (imo, 'potato') and 侍 (samurai). The potato metaphor suggests a rustic, unsophisticated person, similar to English 'bumpkin'.