Surface Friend 

A friend or acquaintance whom you know through school/work. He/she is not involved in your personal life and conversations are superficial, almost always relating to school/work.

Nah I don't talk to that classmate about my life, he's just a surface friend.

Surface Friend by john doe smith johnson chan March 19, 2009

Surface Friends 

The state of being non-exclusive

State of being friends for only appearance and other social events i.e. Little 500 Weekend or Weekly lunches

Not to be confused with the antonym :Friends

Duties-
-No phone calls
-Only waving when necessary

-Sitting together ONLY when mutual friends are present
-Minimal text messaging

-Having alternate schedules
-Non-acknowledgment at social events, parties, movie nights, study groups, probates, malls, kiosk, etc.
-Always provide proof and reason for your "Surface-necessity Friendship"

Boy: We're just Surface Friends, but if you're not doing any thing wanna go to the doctor with me?

Girl: No thanks, because we're just "surface friends" and thats over stepping my SF responsibilities

Boy:Trust! you were the last person I asked

Girl: Of-course because we're just Surface Friends

Surface Friends by The Orignal "Surface Friend" April 26, 2010