The term 'Chong Sesh' refers to a (usualy) pre-arranged period of time where an individual, or more commonly a group of friends, all come together and smoke a lot of cannabis for recreational use. The word 'Chong' being a slang word describing the action of using a bong, and 'Sesh' being a slang word which is short for 'session', thus 'Chong Sesh'.
by JeVeuxAJ August 16, 2011