high dohnoun [ S ]
uk/ˌhaɪ ˈdəʊ//ˌhaɪ ˈdoʊ/specializedalso high do the musical note that is one octave (= eight notes) higher than the note do in the sol-fa system
be up to high doh
Scottish English informal to be in a very nervous or excited state:
I don't mind confessing that I was up to high doh with excitement before the game.