[[File:Sturgeonfacesam.png|400px|thumb|A collection of Sam's sturgeon faces by wings-of-destiny on tumblr]]
It's a classic Sam expression, used to
expression a range of feelings from extreme displeasure to bemusement.
The term "Sturgeon Face" arose from an internet meme
which defines it as "turning down one’s corners of mouth so that it forms an excessive frown".[http://knowyourmeme.com/memes/sturgeon-face source].
* [http://eastcollins.tumblr.com/sturgeon Sam Winchester Sturgeon Face Collection] by eastcollins