Top Definition
While performing a motorboat on a girl, the giver projectile vomits, sending the rancid, chunky liquid across the chest, shoulders, and neck area.

Similar by name to a pearl necklace, but typically a much less desirable outcome, though some with a vomit fetish may find it sexually arousing.
Guy 1: Dude, did you hear about the party last night?
Guy 2: no, man...what happened?
Guy 1: Oh, this guy got to motorboat that hot girl in Chemistry, but he was so wasted he puked all over her. She almost started crying, and left the party.
Guy 2: Ha! I guess it was her first corn necklace!
by FetishFloor August 29, 2011
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