Some job's phrasal verbs!

I'm up to my ear in work.
= I am very busy!

Are you on a loose end this evening?
= Are you free this evening?

I've already got enough on my plate!
= I have enough work to do!

I can fit you in on Monday.
= I can be instead of you on Monday.

I'm tied up till after lunch.
= I am terribly busy till after lunch.

Before leaving, I have to clock out.
it is clear!