The 'Futurama Fry' meme, famously known as 'Not Sure If,' features the protagonist Philip J. Fry from the animated series Futurama squinting his eyes in suspicion. The still is taken from the season 2 episode 'The Lesser of Two Evils,' specifically during a scene where Fry mimics the facial expression of a character he is observing. It became a viral sensation in early 2011, characterized by its bipartite caption starting with 'Not sure if' and ending with 'Or just.' The meme perfectly encapsulates internal monologues of skepticism and is widely used to highlight ambiguous situations where the observer cannot tell the difference between two possibilities, such as sincerity versus sarcasm.