idiomsomething you say inorderto show youthinkthat something isunlikelytohappen:(表示不太相信)胡扯,哪有那样的事"Mike says he's going to give upsmoking." "That'll be theday!"“迈克说他要戒烟了。”“别听他的!”SMART Vocabulary: related words and phrasesImpossible and improbable
apt
aptness
be out of the questionidiom
be pissing in the windidiom
beggar
doubt
fat chanceidiom
fear
flimsily
flimsiness
goodbye
goodbye tosomethingidiom
impenetrably
nail
nailing jelly to the wallidiom
nohow
not have a snowball's chance in hellidiom
one in a millionidiom
pig
unicorn
See more results ?(Definition ofthat'll be the dayfrom theCambridge Advanced Learner's Dictionary & Thesaurus? Cambridge University Press)#https://dictionary.cambridge.org//dictionary/english/that-ll-be-the-day##