Define Jam Sesh Meaning

A slang term used by douchebags to describe a jam session. Typically used by shitty/non musicians.

When at least semi-experienced musicians get together and pull songs out of their ass, working all together non-verbally. Almost always involves hilarious bullshit lyrics.

Subconsciously dancing to a song then noticing that others are doing the same, which only makes the group jam more enthusiastically.