Naughty Sesh
Sesh, short for session, depict a rowdy and partying crown. Naughty sesh was popularised in the song "naughty sesh" by majestic and tigermonkey. Naughty sesh's usually take place on a Friday after work this happens because the weekend can be used as a recovering period.
"are you ready for a bit of Friday and a proper naughty sesh"