Ask at the forum if you have an Ancient or Modern Greek query!
Γελᾷ δ' ὁ μωρός, κἄν τι μὴ γέλοιον ᾖ → The fool laughs even when there's nothing to laugh at
P. ἀκάθαρτος, ἀπρεπής, P. and V. ἀσχήμων, V. δυσπρεπής.
disgraceful: P. and V. αἰσχρός.
shameless: P. and V. ἀναιδής, ἀναίσχυντος.