I thought of your request recently when I read that in Northern Ireland slang (sometimes similar to Scots) the word "carn" can mean a impolite, brutish person. Could this be the word? Two other suggestions I have: the word cintra or kintra can be used as an adjective...maybe it's "an auld kintra carl" meaning an old country man? Also, the word "caur" in Scots dialect can mean awkward, but I'm not sure if that's right if you heard an "ed" on the end of the word. Oh well, at least I've refreshed the thread, so maybe that will help!