three cheers for - three successive hurrahs expressing (sometimes ironic) appreciation or congratulation of someone or something.

☞ Qualified approval or mild enthusiasm is sometimes expressed by two cheers for -, as in the title of E. M. Forster's book Two Cheers for Democracy (1951).

2010Guardian So we got Theresa May! She… wasn't good enough to be involved with the manifesto; she wasn't good enough to be part of the negotiating team. But apparently she's good enough to be home secretary. Three cheers for that!