What is Thumbnail Hot?
1.
When someone looks like they might be attractive in their Facebook or Twitter thumbnail until you click on it and find out that they're really not.
"Yeah, at first I thought he was really hot but turns out he was only thumbnail hot."
See
Random Words:
1.
a nice way of refering to a person who is not smart or who does things that are ill-advised
See also: not the sharpest tool in the she..