Green’s Dictionary of Slang

noisily and affectedly upper-class.

1962		F. Norman Guntz 185: After the whooray geezer had done his bird he came out.
1965		G. Melly Owning Up (1974) 184: Who’s that hurray cunt by the mantelpiece?
1975		‘P.B. Yuill’ Hazell and the Three-card Trick (1977) 81: I heard Kevin Barclay’s hooray voice . . . he picks his teeth, you know.