出っ歯でっぱ Noun Noun English jmdict 1 noun (common) (futsuumeishi)nouns which may take the genitive case particle 'no' protruding tooth;overbite;bucktooth さらに、横から見ると、前歯は出っ歯の状態にあります。 Moreover, when viewed from the side, the front teeth are protruding.