1. A 'jaywang' occurs when two or more joints (or 'jays') are being passed around a circle and both joints are passed to the same person at the same time. The person is then said to be 'jaywanged' and is forced to either take a quick drag from both or choose one and pass the other joint on. Hilarity ensues.
The roots of the term 'Jaywang' are said to originate in the 2006 Mitchell and Webb tv sketch 'Numberwang', a classic sketch that delights in being as nonsensical as possible.
"There were two joints going round and they both arrived at Jane at the same time. Total Jaywang."