scoggan

adjective: scoggans; comparative adjective: scogganers ; superlative adjective: scogganiest
1.
lacking intelligence or common sense.

synonyms: unintelligent, ignorant, dense, foolish, dull-witted, slow, simpleminded, stupid, vacuous, vapid, idiotic, imbecilic, imbecile, obtuse, doltish; More
foolish, silly, unintelligent, idiotic, scatterbrained, nonsensical, senseless, harebrained, unthinking, ill-advised, ill-considered, unwise, injudicious;
inane, absurd, ludicrous, ridiculous, laughable, risible, fatuous, asinine, mad, insane, lunatic;
informalcrazy, dopey, cracked, half-baked, dimwitted, cockeyed, lamebrained, nutty, batty, cuckoo, loony, loopy

antonyms: intelligent, sensible
dazed and unable to think clearly.

synonyms: into a stupor, into a daze, into oblivion; More
antonyms: alert
informal
used to express exasperation or boredom.

nouninformal
noun: scoggan; plural noun: Scoggans
1.
a stupid person (often used as a term of address)