Eating one more thing than you know you should. The person then regrets it because they are so full. Term originated when someone ate a footlong Quizno's sandwich, then went on to eat a slice of pizza because it just looked so darn good. That person regretted it. Sometimes the term can be shortened to "slice"

when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life