A hayseed is an unintelligent country person, or a hick. You might be tempted to call your farmer cousin a hayseed, but it would probably hurt her feelings.

The derogatory term hayseed is aimed at rural folks who aren't particularly urbane or savvy — it's a stereotype of someone who's comfortable in the country being awkward, bumbling, and unsophisticated, especially when visiting a city. This US slang comes from the common 19th century saying that country people "have hayseed in their hair."

Definitions of hayseed

n a person who is not very intelligent or interested in culture

bumpkin, chawbacon, hick, rube, yahoo, yokel
Type of:
an unsophisticated country person