Jocularity

It should seem he had that day been in a humour for jocularity and merriment, and upon such occasions I never knew a man laugh more heartily.

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[…] Cristal Nixon at that moment rode up to them, and said, with an affectation of jocularity which sat very ill upon his sullen features, […]

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All were armed with pistols, and there was a small armoury of rifles against a wall. “Guns,” I said with fearful jocularity, “in a holy place?”

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Madouc was neither pleased nor impressed by Prince Bittern’s mannerisms, and remained pointedly unresponsive to his lame jocularities.

Source: wiktionary