A typical event in video games that occurs when there are so many flashing lights on a screen at a given time that you cannot focus on anything, let alone the character you are controlling. It is most common in action games. The term originated from the YouTube channel girlfriend reviews.
Sam: Hey Jake. How are ya doing?
Jake: Pretty tired. I stayed up all night training for the upcoming Smash tournament.
Sam: That game is just diarrhea Christmas lights. I can barely see what Iâm doing half the time because thereâs so much action on the screen.