JAMS- it is an acronym for Just Ate Must Sleep. It is used to describe how you feel after eating an extreme amount of food in one sitting and how you feel very fatigued and dying for a nap.
A small group of moshas/moshers inhabiting stockport fighting a desperate battle against the skallys
they find all skallys words to be stupid and retarded will take the piss out of them to any cost.
eg.
Scally: "eeeer ya yo want a smack"
the reply is often:
"no thnx i thought it migh have been obvious but would you like some cheese"
Marty: They are going to have a rap tournament, and hes putting together jams on his record player (translation: They are going to freestyle, and hes mixing beats on his turntables)