Green’s Dictionary of Slang

1. aloof, snobbish, supercilious.

1824		R.B. Peake Americans Abroad I iii: The English folks are a parcel of highty-tighty, mighty, flighty fellows!
1848		Thackeray Vanity Fair I 257: La, William, don’t be so highty tighty with us.
1851		R.S. Surtees Young Tom Hall (1926) 22: Lady Lavender, trhough painfully aristocratic, now that she had scrambled into the peerage, might have been a little higher bred without disadvatage [...] Be that, however, as it may she was very highty-tighty, fully appreciating the advantages of position.
1891		L.F. Baum Our Landlady 26: The girls nowadays is too highty-tighty for anything.
1895		H. Champion ‘Belinda the Barber-ous’ 🎵 When she got on the job she must have been a bit hi-ti.
1904		F.G. Tyrrell Brimstone Bargains in the Marriage Market 326: Never fear, old man; none of the highty-tighty kind would have anything to do with [him].
1912		E. Pugh Harry The Cockney 279: And stopping out all night! And highty-tighty and la-di-da to your own mother.
1915		F.H. Smith Novels, Stories and Sketches 202: But dey sent Miss Rachel to a real highty-tighty school, dat dey did.
1929		Bugbee & Denton Commencement Treasury 62: Gosh! but they’re a highty-tighty lot.

2. tipsy, slightly drunk.

1895

F.W. Leigh [perf. Harry Champion] ‘Belinda the Barber-ous’ 🎵 When she got upon the job she must have been a bit hi-ti / For she gave me a wink that made me think / I’d better bid the world good-bye.