Three that I despise:

Get it over the line - these words seem to be used in connection with every single transfer deal these days. Where did this nonsense come from?

In the building - another phrase that seems to have popped up out of nowhere in recent years. Very annoying.

The gaffer - olde worlde, working class description of the boss that seems totally inappropriate for modern-day professional football managers (except maybe Neil Warnock, but he’s a dinosaur anyway).

One that I love:

Purple patch - is this used in any other sport or area of life other than football?

Any more suggestions?