shoot my self in the foot,

say something nice

do something good but did harm than good or did damage than made.

Today we have...a sad expression...you TRY to DO/SAY something good, but you only hurt yourself~ Don't do that! Enjoy!!

你二舅姥爷的大姑给你介绍一个女朋友，见到女生后为了表示你的幽默细胞，你讲起来各种段子，一时间得意忘形，开了车，突然女生不笑了，惨了，搞砸了。。。

I met that a girl everything is good, until I give her a dirty joke, shoot my self in the foot.

周末下午你约上你的闺蜜鸡西卡，但是她遗憾跟你说不行了我得在家做ppt，下周有个很重要presentation.

hi j, how about have a tea break this afternoon?

sorry, I need to finish this ppt for a presentation next Monday, this takes me a week!!

oh, Sounds like you’re shooting yourself in the foot~