Top Definition
The phenomenon in which someone seems far more attractive in the thumbnail version of a profile picture than they truly are.
I thought the girl who sent me a friend request was hot, but it turned out to be a case of Thumbnail Syndrome.
by Ken_II July 27, 2009

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×