Prabhupāda: There are two slogans. One Hare Kṛṣṇa, Hare Kṛṣṇa. And another short, is Hari bol, Hari bol. You can practice also that. Hari bol.
Devotee: Hari bol.
Prabhupāda: Yes. Hari... that is shortcut of Hare Kṛṣṇa. Yes. Hari bol. Hari bol means 'the sound of Hari, or the Lord', Hari bol. So whenever there was some greeting, Caitanya Mahāprabhu used to answer, raising His hands, 'Hari bol'.