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Intimate and inseparable friends. Has nothing to do with being someone's butt buddy.
E.B: Thank you so much for squiring me. These gentlemen being so obviously compelled by other responsibilities, such as scrutiny by former boon companions.

Dan: We was never your fucking boon companions, E.B.
by AlAboos February 26, 2008
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2
a makeshift friend that you get placed in the same crummy situation with.
the people you talk to while in line at the airport are your boon companions.
the boyfriends of a bunch of girls who are all friends become boon companions.
by shanooligan February 17, 2007
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