1. Insanely irresponsible
   "an idiotic idea"
   - crackbrained 
2. Incongruous; inviting ridicule
   - absurd, cockeyed, derisory, laughable, ludicrous, nonsensical, preposterous, ridiculous 
3. Having a mental age of three to seven years
   - imbecile, imbecilic

See also: foolish, idiot, idiotically, insane, retarded

Encyclopedia: Idiotic

• factor analytical
• factor analyze
• factor I
• factor II
• factor III
• factor in
• factor IV
• factor IX
• factor of proportionality
• factor of safety
• factor out
• factor V
• factor VII
• factor VIII
• factor X
• factor XI
• factor XII
• factor XIII
• factorage
• factorial
• factoring
• factorisation
• factorise
• factorization
• factorize