The Bitchface™ is undeniably one of Sam's most remarkable facial expressions. It can be seen as early as the Pilot, and as late as the season 7 finale.
Epic Sideburns Bitchface™
Throughout the seasons, it is evident that there are certain situations that never fail to set off the Bitchface™, such as Sam feeling uncomfortable or having to face unexpected trials.
Christmas Ornaments Enthusiast Bitchface™
Possessed by a Demon Bitchface™
However, nothing and no one is as effective in bringing out the Bitchface™ as Dean Winchester.
My Brother is Mean Bitchface™
My Brother is an Idiot Bitchface™
My Brother is a Jerk Bitchface™ (a.k.a. Full Body Bitchface™)
My Brother is an Overgrown Eight-Year-Old Bitchface™
My Brother is an A-Hole Bitchface™
My Brother is an Overgrown Twelve-Year-Old Bitchface™
Dean is so skilled in the art of Annoying One's Little Brother that he can even make Sam pull a Bitchface™ in his own account of the same story.
Bratty Little Brother Bitchface™ (Dean's POV)
Judgmental Bitchface™ (Sam's POV)
It is quite a feat, although not exactly surprising. Dean is Sam's Big Brother after all and also has a tendency to be Mr. Smartypants at inappropriate times. The combination of these two elements makes him the Ultimate Bitchface™ Trigger (UBT).
Dean Winchester, Ultimate Bitchface™ Trigger (UBT)
Sam is most definitely not amused.
Is This Picspam Over Yet? Bitchface™