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Friends you never talk to albeit saying "Hello" and "Goodbye" while passing in the halls. These friends are usually people that you have classes with, people you've done a group project with, lab partners, etc.
"Sara is your friend right?"
"Nah, we did a project together last year; she's a HelloGoodbye Friend."
by Saxazax April 23, 2009

Words related to HelloGoodbye Friend

friend goodbye good bye hello hi