The meme originated from a G.I. Joe redub of public service announcements, where one of the G.I.s commented on how fresh the beats were at a "fuckin old school" dance party. This statement applies to upbeat or dance style, or even retro and memorable, songs that are played during a stream, as intermission, or as part of a Power Hour. They are usually accompanied by Party Arms or even Arm Waving from the viewers.
I'm sorry.