black Monday
1、黑色星期一(1360年4月14日，复活节后的第一个星期一，英王爱德华三世的军队大量冻死在巴黎附近)
2、[学生俚语搜索]倒霉的星期一，(假期后的)开学第一天
3、指股市大跌经常出现在星期一的现象
例如：
Most boys usually nod sleepily over their books on blue Mondays.
许多男孩子在周末尽情地玩耍，而到了星期一却哈欠连天，提不起精神来。
Housewives sometimes wish they could sleep through blue Monday.
度过了劳累的周末之后，家庭主妇们盼着在人们开始新的一周工作的星期一好好睡上一天。
Blue Monday
沮丧，闷烦(相对于欢乐的周末而言)。
是指星期一抑郁症，因为周末结束要开始一周的工作，通常周一都会很消沉；也是一本小说的名字。话说明天就是周一了，要上课好不开心啊…
Saint Monday
(特指交易所)懒散，工作很少的星期一。
都不是圣人，但‘keeping Saint Monday’原先是用来描述星期一不工作的习惯。其英文原文参考：
Not a saint at all, but ‘keeping Saint Monday’ was formerly used to describe the regular practice of staying off work on Mondays, particularly in the shoemaking trade. The custom was already well known in the 17th century, as evidenced by the line in the play: ‘They say Monday's Shooemaker's holliday, I'le fall to that trade’ (Dekker, If It Be Not Good, The Diuel Is In It (1612). This gives the lie to a legend, involving a Perth shoemaker and Oliver Cromwell, which seeks to explain its origin (Folk-Lore Record 1 (1878), 245–6). The custom fell into disuse following the gradual spread of more regulated working hours and the introduction of half-day working on Saturdays. There is a French phrase, reported from the 16th century, faire le lundi des savetiers, or ‘to keep the cobbler's Monday’.
Mad Monday
(特交易所)忙乱的星期一。
Monday morning feeling , Monday feeling
美国人在周末休假后星期一不想工作的那样一种心情。
Monday morning quarterback
放马后炮的人。Monday morning quarterbacking 放马后炮。
在足球场上，quarterback（四分卫）算是整个球队的主帅，每次进攻的时候，球一定要先传给四分卫，然后由他决定下一步的方案，由于四分卫是重要角色，球迷们在品评球赛时，常把四分卫看成一大看点。
这个短语用法也是来源于球赛的评论。据说，在1932年的某个星期一的早上，美国各大报纸铺天盖地挤满了某个评论员对上个周末球赛的评论，而评论大多围绕着"四分卫本该如何如何......"。于是Monday-morning quarterback后来就常被用来比喻"自作聪明，事后才发表真知灼见的事后诸葛亮"，就相当于我们中文里面说的"马后炮"的意思。
e.g.
A: If I were him, I would have... (如果我是他，那我就会...)
B: You Monday-morning quarterback. (切，你这个马后炮。)
