Akademik

хоть караул кричи
ХОТЬ КАРАУЛ КРИЧИ coll
[хоть + VPimper; Invar; predic or subord clause; usu. this WO]
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(used to express despair, helplessness) the situation is so trying, hopeless that some person feels desperate:
- you <he etc> could just cry <scream, climb the walls>;
- it's enough to make you <him etc> cry <scream, climb the walls>.

Большой русско-английский фразеологический словарь. — М.: ACT-ПРЕСС КНИГА. . 2004.