Floater Friend

A floater friend is someone who knows a lot of people but isn't really close with any of them. A lot of the time floater friends feel left out as all their friends prefer someone over them. They tend to 'float' around different friend groups

Marnie: I hate being a floater friend. I feel so left out, you know?
Jack: "Huh? Oh sorry I was talking to Andrew"
Marnie: :(