Feminine of an unused noun (apparently from halal) meaning bluster; braggadocio, i.e. (by implication) fatuity -- folly.
see HEBREW halal
H8418. tahalukah
[תַּהֲלוּכָה] noun feminine procession, only plural תַּהֲלֻכֹת Nehemiah 12:31 of thanksgiving-processions at dedication of wall.