Top Definition
Zildo is an ancient martial art formed on the planet Zil and practiced by its military.
"Luis' Karate was no match for Norman's Zildo."
by iPooPant August 12, 2011
Zildo: A dual insult for a person who is acting like a Dildo and is already a zilch, or perhaps if the person is normal and does something so pathetic that he/she should be immidiatly called a Zildo. The combination of a Zilch and a Dildo.
"Hey Bruno, you are a real Zildo for lighting that Dogs tail on fire"!
by The Pope NMG September 23, 2008
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