Definition of it isn't over till the fat lady sings in English:

it isn't over till the fat lady sings

Used to convey that there is still time for a situation to change.
[by association with the final aria in tragic opera]
See parent entry: lady

Definition of it isn't over till the fat lady sings in:

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Word of the day bimble
Pronunciation: ˈbɪmb(ə)l
verb
walk or travel at a leisurely pace