1 it ain\'t over until/till the fat lady sings | Definition of it ain\'t over until/till the fat lady sings

it ain't over until/till the fat lady sings

idiom

Definition of it ain't over until/till the fat lady sings

US, informal
used to say that the final result of something (such as a sports contest) has not yet been decided and could still change We're losing, but remember: it ain't over till the fat lady sings.