Latcher
An Outsider, usually a new kid at school who will follow the popular friend groups around without actually being one of them. The Friend group actually hate the Latcher and the best thing they can do is to tell him to go away and never latch on again. The Latcher usually comes from a background where they have been ignored by parents, peers and everyone else in society. Therefore they cling onto anyone they can find, rather like a parasite or a leech. It would be fair to call a Latcher a leech.
Cool Kid: Come on lads, let's play some footie!
Barnett (example of a Latcher) follows them without being invited
Woke cool kid: Oi what are you doing you Latcher? Go back to the toilet where the rest of you pond scum reside.