This is a motto used a lot by the rapper BONES. You can hear it in every song that he makes. The word itself is the short form of SESSION, which associates to smoking weed and getting high as fuck.

An event in which mainly teenagers take/drink an excessive amount of drugs and/or alcohol, with some seshes leading to hospital . They often involve non-initiated sesh gremlins being peer pressured into drug taking or alcohol drinking.

A sesh is where a bunch of Chavy teens go to a gaff or the local woods to take excessive amounts of alcohol and drugs

A 'session' in which a group of people all smoke bong's and get fucked up. I guess its well-covered by AstroBlue.

1. Verb - To smoke pot
2. Noun - A session of any sort, whether it be video gaming, sports playing, etc.
3. Noun - Something being awesome or going your way. Or an exclamation.
(Basically, sesh can be used in any form or context.)

To have fun, rave, party, have a good time, exceeds all expectations

Often used with the word "bare" to form "bare sesh" for when the sesh was epic

Could also refer to a sexual experience

Time spent surfing and or body-boarding.