Often used in the gaming environment, but is applicable to real life when someone is completely clueless
you can't put foil in the microwave you nobo!
Used among friends in response to a request or a thank you, essentially means 'Not a problem' or 'No worries'. (Informal)
Tom: Window by the kitchen is still open, forgot to close it.
Jenny: Thanks, appreciate that.
Tom: No bo!
2, Look there goes one them nobos stupid filth they are
Troll: Hahaha GTFO.
Nice man: Hahahaha GTFO NOBO. This is a 5+ roleplay and you spelled every word wrong. Also, 7+ line deaths. Stupid.
Troll: What a NOBO. GTFO.
2. A designation prescribed by a hobo to a non-hobo. Signifies the non-hobo's lower standing in the hobo's social structure.
3. An individual with a weak constitution.
Go get me a beer, nobo.