「老懵懂 / 老懵董」

(pos:名詞)
<explanation>
yue:年紀大、精神差、智力下降嘅人；略帶侮辱成份（量詞：個）
eng:(derogatory) a person who is old and stupid
<eg>
yue:阿爺年紀雖然大，但係唔係老懵懂，你唔好呃佢啊！ (aa3 je4 nin4 gei2 seoi1 jin4 daai6, daan6 hai6 m4 hai6 lou5 mung2 dung2, nei5 m4 hou2 aak1 keoi5 aa3!)
eng:Although Grandpa is old, he is not old and stupid, don't try to cheat him!