1) Absurd 2) Asinine 3) Beyond silly 4) Beyond stupid 5) Childish 6) Completely foolish 7) Crackbrained 8) Crazy 9) Daft 10) Dopey, today 11) Dumb 12) Dumb and dumber 13) Extremely stupid 14) Foolish 15) Hardly sharp 16) Harebrained 17) Inane 18) Incongruous 19) Insane 20) Insanely irresponsible 21) Inviting ridicule 1) Absurd 2) Asinine 3) Crackbrained 4) Crazy 5) Derisory 6) Dopy 7) Dumb 8) Foolish 9) Imbecile 10) Imbecilic 11) Inane 12) Insane 13) Laughable 14) Nonsensical 15) Preposterous 16) Silly 17) Stupid 18) Unintelligent 
• (a.) Alt. of Idiotical
idiotic An offensive term that deliberately insults someone else’s behavior.
of, pertaining to, or characteristic of an idiot. · senselessly foolish or stupid: an idiotic remark.