PHEW

[exclamation] [informal] [esp. humorous] - an expression of surprise, tiredness or relief (= happiness that something that was causing you anxiety is not going to happen)Phew, I think I need to sit down after all that dancing!You've got to feed fifty people? Phew, that's quite a number!So I don't have to give the after-dinner speech after all - phew, what a relief.