Top Definition
A person you only ever see/talk to on the bus, who you don't quite consider a friend, but are friendly to.
Person A: Hey! You're my new bus buddy!
Person B: Yeah!

(Person A never invites Person B out or to hang out with friends, but talks to Person B about everything whilst riding the bus)
by CamoShortShorts May 15, 2009
The most amazing person in the whole wide world.
IDK, my BFF Bus buddy?!
by OMFG its me BB April 24, 2008

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