用于表示同意别人的否定说法，表示“我也是”“我也一样”，用me either和me neither都可以，但me either属美国英语用法。下面是《朗文当代英语词典》的相关解释：
▲《朗文当代英语词典》在me词条有两条习语：
1. me too: spoken used to tell someone that you feel the same way as they do, that you are in a similar situation etc. 我也一样
“I'm hungry!” “Me too.”
2. me neither also nor me: spoken used to say that you agree with a negative statement that someone has just made 我也一样（表示同意别人说的否定语）
“I can't believe he's fifty.” “Me neither.”
▲《朗文当代英语词典》在eithr词条有一条习语：
me either: AmE spoken used to say that a negative statement is also true about you （美，口语）我也是（用于否定句）
“I don't have any money right now.” “Me either.”