An adverb before 놀리다, to tease or make fun of. In these lines it is friendly needling among people who know each other: teasing kindly, teasing with gusto, wanting to tease him badly, teasing each other back and forth, and one where the payback comes at triple strength. Do not read it as 놀다, to play; the two look related but 놀리다 here is done at someone's expense.