Idiom: That'll Be The DayCheck definitions of...bethedayMeanings No meanings yet, come back later! A-Z Proximitiesthat does itthat dog don't runthat ever walked on two legsthat figuresthat way that'll be the day that's all she wrotethat's done itthat's just methat's saying somethingthat's thatSimilar Idiomsthat's that on thatday after dayday in, day outthat'll be the daythat's thatat the end of the dayas the day is longback in the daycatch of the daygive the time of dayrue the dayrule the daysave the daysee the light of dayseize the daythe other daywin the daykill the goose that lays the golden eggslike the cat that got the creamthe straw that broke the camel's backSimilar Phrasesday-after-dayday-by-dayday in day outday-to-dayadmission dayamerican indian daycall it a dayday bookday campannunciation dayapril fools' dayarbor dayarmed forces dayarmistice dayday gameday offday returnascension daybastille daybissextile day