موهایش / ریشش را در آسیاب سفید نکرده

Question

و

Comments

See:  http://goo.gl/JZSLdl

Answer 1

It has almost the same meaning:

I was not born yesterday!

Answer 2

an old hand someone who has done a particular job or activity for a long time and who can do it very well (often + at ) She's an old hand at magazines, having trained on Cosmopolitan before editing Company

Comments

tnx, but I want an idiom for it