Dead Meat (Behavior Card Day, Behavior Item Day, etc.) is a popular GoAnimate punishment trope. It's usually called "Behavior ____ Day" or "_____ gets in dead meat". Dead meat is an expression for being doomed. Those videos are some kind of alternate version of report card days, where the students get to have rewards and punishments instead of just a note to their parents. Some videos even have logos or something unique instead of students.
Behavior Days would be a really bad idea in real life because it would stir up a lot of jealousy and conflicts, and that would also destroy the self-esteem of many students because they get bad cards, and the teacher gets to show favoritism towards the students.
Behavior Card/Chart Days
This is the most popular type of dead meat videos. In the plot, a teacher, sometimes the user who created the video, announces that it's Behavior Card Day (or Behavior Chart Day), and there is also has a range of cards on the blackboard. The teacher calls each student one by one, ranked from the best to worst card. The last one to get called gets in "dead meat" (most often a black card) which means they get expelled. Sometimes the teacher gives out all the cards at the beginning instead, then names out the reward or punishment for each student and sends them one by one to the principal's office. Good cards have more stereotypically positive colors (like blue, or green) while bad cards have more 'negative' colors (like yellow, orange or red). There is also a white card that's neutral and means nothing happens, making the student just go back to their seat. The teacher always ranks the students based on their own favoritism mixed with their actual behavior.
Usually, the student in dead meat is so shocked that they say "um" several times, then apologize and beg for another chance, then the teacher gets into a fit of rage and says "ABSOLUTELY NOT!", calls them the worst student ever and expels them out of the school. Then the student gets grounded. Alternatively, the dead meat student even gets killed or banished to another dimension such as Hell.
There are some videos that include a character cheating by sneakily switching a person's good card with their bad card, and the students usually notice.
There are also behavior days where there are items or other things instead of cards, but the plot's still the same. There are some unique dead meat videos as well.
There is a specific type of BCD plot in which the students keep arguing and fighting, as their behavior changes their rank during the video. In the middle of the plot, the teacher goes to the bathroom and a student changes the numbers or cards to their own advantage.