pick a hole in
Находить оплошность или неувязку в чем-либо; критиковать; выражать неодобрение.
The witness said he had been walking in the moonlight last Sunday, but the lawyer picked a hole in what he said by proving that there was no moon and that it rained Sunday night.
Mary is always picking holes in what the other girls do.
Ср.: FIND FAULT.