buffer guest
i invited jona over as a buffer guest in case tim or josh came over early, because i don't really have a lot in common with them
a buffer guest is a close friend that you invite to a party ten or 15 minutes before the rest of the guests are scheduled to arrive
"i invited jona over as a buffer guest in case tim or josh came over early, because i don't really have a lot in common with them" What is the definition of "buffer guest"?