courtesy friend 

Someone you may or may not have met who asks to be your friend or contact on a social networking site, such as Facebook. Out of social obligation, you are compelled to accept the invitation, but you end up hardly or never communicating with the person anyway.

Jim is just a courtesy friend. We went to high school together, and I vaguely remember him being a total loser. I didn't want to insult him, so I just accepted his LinkedIn invitation. I'll just silently unfriend him in a month or so, and he probably won't bother me again.

courtesy friend by Shiran Pasternak November 2, 2008

Courtesy friend 

Friend requests you accept on facebook or Linkedin only because you happen to work att same place or go the same school. They're actually quite cringe, but you feel too awkward to decline.

Woohaaa, you actually friend with Dick-John?
OMG no, he's just a courtesy friend.

Courtesy friend by Mr. Cocksson February 5, 2020