Top Definition
The nickname for a Korean idol het relationship/pairing combining SNSD's Jessica and SHINee's Jonghyun. They sang Sexy Love together and are a sexy non-couple thing.

Also, they have the capability of making Shawols and Sones extremely insane and jealous anytime they interact.
Did you see Jonghyun touch Jessica's butt?! I hate Jongsica! Don't you dare touch my precious angel unnirrrrrr!!!

Jongsica is real? Puh-lease oppar didn't even want to touch that horse chin unnir's hand when they walked down the runway!!!

LOL Jongsica is never gonna happen because Jessica is a year older than Jonghyun therefore it can't be real.
by jjfrench November 14, 2012

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