我们管那些事后才发表看法的行为叫“马后炮”。可还有那么一些人，干活时不见他们，等到享受到时间了，他们就立马出现，还表现出一副热心想帮忙但没机会的样子。这样的人在英语里可以叫last minute helper。
last minute helper is that person who shows up after everything else is done and offers to do something after everything is already finished.
last minute helper指所有事情都完成以后才出现，或者别人把所有事情都做完后才提出帮忙的人，我们称为“事后帮手”。
for example:
joe showed up when we got all the dishes ready. he offered to set the table, but mary already did it. he is definitely a last minute helper, you cannot count on him.
乔来的时候，我们已经做好菜了。他要求摆置餐桌，可是玛丽早就摆好了。他绝对是个事后帮手，一点都指靠不上。