面目可憎 is a four-character idiom (成语) that literally means 'face and appearance are hateful', used to describe someone whose looks or demeanor are so unpleasant that others find them repulsive. It carries a strong subjective judgment and is often applied in a literary or exaggerated tone. The word 可憎 (kězēng) means 'detestable' or 'hateful'. Note that the standard pinyin of the full idiom is miàn mù kě zēng, but the input pinyin truncates the last syllable.