Shit Pickle is a character that appears in some episodes of the Angry Video Game Nerd.
It's usually presented to highlight a very shitty game.
His speech pattern consists of saying 'shit' and 'pickle' in preceeding order. 
Episodes that he appears in:
Master Chu and the Drunkard Hu (He helps commentate on the game, such as calling the graphics "shit.")
Action 52 (The nerd is playing and sees a figure that looks like shit pickle, and a bunch of them pop out of the screen, scaring the nerd.)