狗嘴吐不出象牙 gǒu zuǐ tǔ bu chū xiàng yá <p>◎ <strong>狗嘴吐不出象牙</strong> <span class="pinyin">gǒuzuǐ tǔbuchū xiàngyá</span></p> <p><span class="green">[look not for musk in dog's kennel;a dog's mouth emits no ivory]</span> 比喻坏人口里说不出好话。也作“狗嘴长不出象牙” </p> 七字成语