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A friend group is a collection of people from one part of your life, who don't necessarily know people from your other friend groups.
1. "This is going to be fucked tonight, like 3 of my friend groups are all blending at this party."

2. "I can't believe my co-workers, my BFF from grade school, and my grrls are all going to be here tonight. How random! I hate it when my friend groups collide - aarrggh!
by Jerry Tischleder June 09, 2008