A generic insult used to describe one who excessively repeats insults for lack of better ones. Derived from the Greek word 'Decymá', meaning "Redundancy".
A: You're a fool, and a peasant.
A: You're also a peasant B: And you're a Dembacile.
1. A person who is publicly and willfully stupid. 2. One who posts stupid things on Internet forums. 3. A politician who frequently is seen with his or her foot inserted in his or her mouth.
Did you see what that dimbecile posted yesterday about Obama?" "I can't believe I wrote that. I'm such a dimbecile