For pronunciation and definitions of ㄏㄏ – see 呵呵 (“sound of laughter; sound of derisive or perfunctorylaughter; etc.”). (This term is an Internet slang variant form of呵呵).
Etymology 2
For pronunciation and definitions of ㄏㄏ – see 哈哈 (“the sound of someone laughing out loud; the sound of someone laughing out loud; etc.”). (This term is an Internet slang variant form of哈哈).