What is Mayo Dart?
1.
Used by kitchen staff in restaraunts as a form of revenge against irritating coworkers (and patrons, if you're daring), a mayo dart is a toothpick dipped in mayonnaise (or similar substance), and lobbed at the offending person while he is facing away, sticking to the back of his shirt without his knowing it's there.
If the servers give you too much attitude, throw some mayo darts at them
