What does it mean when a girl gives another girl a middle finger?

[LinkxPeach]

I was on the bus earlier today, and this girl gave a middle finger to her female friend.

[ShygirlX_0]

I do that with my friends as just telling fk off but in a funny way not mad at all 😂

[karaspara]

In the UK it means fuck off

[Gwenhwyfar]

Pissed at her

[Anonymous]

Hate eachother