That old man talking to himself all day is just a harmless goomer, but everyone is used to him.

goomer 是俚语，指"古怪的人"或"怪人"，通常带有无害或滑稽的意味。这个词可能源自方言或特定群体的口语表达，用来形容行为怪异但不会造成伤害的人。