ハイサイはいさいMeanings1interjectionhello; himale term, language, or nameA casual greeting used primarily by men in Okinawa. The female equivalent is ハイタイ.See also: ハイタイハイサイ、元げん気きにしてた?Hey, how have you been?ハイサイ、今日きょうも暑あついね。Hi, it's hot again today, isn't it?