Someone or something that is lame, uncool, or generally disliked. They are often times from the southern part of the United States, which may or may not have a relation to the plant, "buckwheat". It can be used as a direct insult or used playfully between friends. The noun "buckweed", is not considered a swear or overly inappropriate but is not something good to be called.
"Don't touch that you stupid buckweed!"
"Dave is such a buckweed, I can't beleive he lost my phone."
"Get over here you buckweeed, you have some explaining to do."
A term used in Northern Ireland to describe a person with little or no common sence. A complete eejit of a human who lacks the most basic hygenic and communication skills that most of us take for granted.
Buckweeds are commonly found speeding through the narrow country roads in white BMW's while sporting a massive joint.
Look, here comes this buckweed Andy, he's lookin a right cunt.