γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → the fool laughs even when there's nothing to laugh at
P. οἰνόφλυξ, ὁ or ἡ (Xen.), or use adj. P. φίλοινος (Plato); see also drunken.
