Top Definition
A horny lizzard that enjoys cross species insemination.
"Dude, your pet geko is such an erectonilian, is just tried to bite my penis."

"Can you believe how much of an erectonilian those lizzards are at the zoo? They were doing it right infront of the 3rd graders."
by Anal Flamer March 18, 2007
6 Words related to Erectonilian

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