blumpkinのようなどんな単語でも探してください。
 
1.
Something or some situation very difficult to deal with satisfactorily. You may use just 'tough nut' too.
Property division is a tough nut to crack in divorce.
Iraq has become a tough nut for the U.S. government.
João Rodegheriによって 2006年11月26日(日)

Words related to tough nut to crack

headache hot potatoe pain in the ass pain in the neck tough shit