A friend that you always hang out with and talk to at school but when you go home and during the weekend you don't even keep in touch with him/her. You usually only talk to this type of person when you have no one else in class to talk to or when you have no one else to eat lunch with.
Cris- Yo why don't you invite ur friend that ur always eating lunch with?
John- Na I only talk to him at school I never really hang out with him outside of school.
Cris- Oh, I guess he's ur class resort then huh?