noun: People who like buses, typically taking many photos of buses to later put onto a forum and share with other bus nuts. It is their obsession.
Brad is such a bus nut, he takes his camera everywhere in case he will see one!
by stonedfly December 20, 2008
A crazy or outspoken person on the bus (or train or other public transportation). A person who acts out their own private dramas on the bus, talks to the voices in their head, or otherwise puts on a show for other passengers (see also, Bus Drama)
Some busnut started yelling at a tourist on the subway for bumping into him.
by michaelp August 13, 2011
When semen is released from the penis
Yo Blood i bus nuts on that chicks top lip
by Bukaman August 05, 2006