Master Sesh 

When a person or group of people smoke(s) a massive amount of marijuana in one sitting.

Stoner 1: "Homie, my friend and I had a master sesh last night. We smoked a quad between the two of us."

Master Sesh by JDRstoned August 17, 2009

mastersesh 

the ultimate uninterruptable masturbation session

i locked the door, turned off the lights and threw on some quality internet porn. not even julius would be able to interrupt this mastersesh.

mastersesh? masterbest!

mastersesh by yourname.001 March 5, 2011