The phrase "a friend in common" is correct and usable in written English.
It can be used when referring to a mutual acquaintance shared between two or more people.
Example: "I met Sarah at the party, and it turns out we have a friend in common, Mark."
Alternatives: "a mutual friend" or "a shared friend".
We had a friend in common, and he saw me sing "Christmas Wrapping" by the Waitresses one night in Brooklyn, at karaoke.
"Thiago Pereira and his wife Gabriela Pauletti were in Club France, the French house in Brazil, and they were celebrating the birthday of a friend in common," said Perez.
According to Mr. Cohen's 2005 interview with city investigators, Mr. Cohen has known Mr. Kerik for several years, having been introduced by a friend in common, Nathan Berman, a real estate developer who has also lent Mr. Kerik money.
Says the haulier,"A friend in common at a local mosque [in West Bengal] passed me a message saying representatives working for two militia groups in Bangladesh wanted a meet in a madrassah [seminary] in Siliguri".
Sophia: We had a friend in common who had been inviting me to come to her apartment, and I kept turning her down because she wasn't a good friend, but she was nice enough to invite me and I thought I might as well just do it and that will be the end of that.
But you have a friend in common with everyone you're shown.
If you've ever tried an online dating site like Match.com, there's a good chance that you found your first few interactions with other members to be unnatural — from the awkward initial messages to the fact that you probably don't have a single friend in common, the whole process can feel a bit forced.
Johnson (1927-1995) kneWarholol socially; the two had a close friend in common, the Factory photographer known as Billy Name.
It was only in the 1990s that I got to know him in person, for it turned out that we had a good friend in common.
They had met in 2000, when Ms. O'Connell was also working at Winebow, and as they had a close friend in common, they saw each other regularly in group gatherings.
A worthwhile suggestion from one of my friends I enlisted to test the app was for Let's Date to tell a user if you have any friends in common on Facebook, since it pulls from Facebook to make your profile.
