Большой русско-английский фразеологический словарь
Я18
ОТСОХНИ (у меня) ЯЗЫКsubstandInterjInvaroftenfoil. bya clause introduced by если, колиfixedWO
used to emphasize the truth of a statement or the sincerity of a promise
may my tongue dry up and fall off
may my tongue wither (faU out).