Английский словарь американских идиом - say uncle

also cry uncle {v. phr.}, {informal} To say that you surrender; admit that you have lost; admit a defeat; give up. * /Bob fought for five minutes, but he had to say uncle./ * /The bully twisted Jerry's arm and said, "Cry uncle."/ * /The other team was beating us, but we wouldn't say uncle./ Compare: GIVE IN.