in common with

a friend whom you have very little in common with and you act on your best-behavior when you're with. A best-behavior friend does not typically know the extent of your true character or transgressions because you misrepresent the truth to make yourself look good or innocent

This guest or group of guests is meant to 1) make it seem like the party has already begun and good times are to be had and 2) make it less awkward in case someone you don't know particularly well arrives before everyone else. > 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

act of giving in common with others for a common purpose especially to a charity n

n the part played by a person in bringing about a result n a voluntary gift (as of money or service or ideas) made to some worthwhile cause n act of giving in common with others for a common purpose especially to a charity n an amount of money contributed n a writing for publication especially one of a collection of writings as an article or story

Divided, shared, or participated in, in common with others.