also hoity toity, 1660s, "riotous behavior," from earlier highty tighty "frolicsome, flighty," perhaps an alteration and reduplication of dialectal hoyting "acting the hoyden, romping" (1590s), see hoyden. Sense of "haughty" first recorded late 1800s, probably on similarity of sound.
hogweed
hogwort
ho-hum
hoi polloi
hoist
hoity-toity
hoke
hokey
hokey-pokey
hokum
hold