Random night spent with close friends usually involving a LAN party.
When your girlfriend is asking for something to do together in the evening and you go with:

"Nah, today's Thursday, it's bobonight!"

On a generic online communication platform, once connected, the involved subjects usually start with:
A: "Bobo? Bobo? Boooobo?"

B: "Bobo! Bobo! Bobo!"
by Zazendi August 17, 2020
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