見牙唔見眼 (gin3 ngaa4 m4 gin3 ngaan5) — smiling broadly (such that one "sees the teeth and not the eyes") in Cantonese
gin˗₃見ngaaˎ₄牙mˎ₄唔gin˗₃見ngaanˏ₅眼简 见牙唔见眼
Mandarin Pinyin: jian4 ya2 wu2 jian4 yan3
Meaning of 見牙唔見眼
nounsmiling broadly (such that one "sees the teeth and not the eyes")
nounto have a big grin on one's face [colloquial]