dumbass numskull nitwit pendejo simpleton jackass bonehead insignificant piece of fucking idiotic moronic shit

Don't disrespect Sir, Fiddlesbone like that, he's the GOAT

unintelligent ignorant dense brainless mindless foolish dull-witted dull slow-witted witless slow dunce-like simple-minded empty-headed vacuous vapid half-witted idiotic moronic imbecilic imbecile obtuse doltish gullible naive blithering blunt deficient nitwitted oafish opaque simple stolid unsmart weak-minded addle-brained dumb dopey thick dim birdbrained fatuous thickheaded boneheaded dim-witted senseless lamebrained chuckleheaded dunderheaded airheaded gormless bonehead pinheaded lunkheaded softheaded bubbleheaded knuckleheaded dorky lamebrain brain-dead thick-witted dopy soft daft dozy silly cretinous slow on the uptake wooden-headed bovine pea-brained muttonheaded inane dotish dippy dof crazy glaikit chowderheaded pig-ignorant blockheaded feeble-minded asinine fat-headed blockish thick as two short planks

Uhm, no Sir, Fiddlesbones, is an intelligent being, more than that of the brain of yours, and he's so smart he graduated from Harvard, las year.

a brick short of a load not intelligent wet behind the ears pie-faced very stupid two sandwiches short of a picnic as green as grass blundering ill-mannered unperceptive unimaginative crude uncomplicated anencephalic anencephalous soppy clownish unreasonable duncelike nonsensical dumb as a box of rocks dumb as a bag of hammers pointless irrational impassive boorish fatheaded crackbrained preposterous ignoramus loggerheaded clottish childish idiot dark immature laughable shortsighted rattlebrained insane lunatic doolally wacky credulous feeble deranged dappy flakeyUS flakyUK phlegmatic chowderhead not bright harebrained dizzy frivolous featherbrained skittish flighty whacky featherheaded tomfool balmy half-brained irresponsible inept log-headed slow on uptake thick as mince not quite right not all there off the air as daft as a brush incompetent nescient oblivious bone-headed addle-pated stunted ill-advised pea-brain lacking knowledge out of it draggy benumbed moony numb unacquainted incognizant pinhead dumbbell underachieving dumdum yo-yo thick as a plank impractical unconscious awkward cumbersome elephantine bungling clumsy lumbering numbskull dumbo exceptional weak mentally defective gorked defective held back sappy gawky ungainly thick as a brick unco groggy lazy slumberous indolent apathetic idle passive shiftless supine dim-bulb piffling wee ould out drugged hibernating comatose vegged out out cold rash careless negligent neglectful daydreaming spaced-out

No thank you, Sir, Fiddlesbone is TO smart for that NONSENSE