Note: I've actually submitted this definition to Hasbro and to Merriam Webster, the manufacturers of The Scrabble Players Dictionary. Your other definition entries are good, but obviously they cannot actually appear in any medical dictionary. However, it seems that this definition has an actual function and place in a dictionary because it describes a common real-life situation (such as "wipeout" in surfing and "misdeal" in cards, etc)...and there is currently no dictionary listing for the situation.
Bob: "Hey, quoning is part of playing Scrabble. Don't blame me if you're too chicken to challenge such an idiotic term!"