on the off chance
on
ɒn
on
the
ðə
dhē
off
ɒf
of
chance
ʧɑ:ns
chaans
on the off-chance

Definition & Meaning of "on the off chance"in English

on the off chance
01

used to refer to the possibility of something happening or being true 

on the off chance definition and meaning
Idiom

What is the origin of the idiom "on the off chance" and when to use it?

The phrase "on the off chance" is an idiom that is often used to describe an action taken in the hope of a positive outcome or result, even if the likelihood of that outcome is quite low. The origin of this phrase is not precisely documented, but it likely draws from the idea of taking a chance or a gamble when the odds are not in one's favor.

Examples
I called the restaurant on the off chance they had a table free. 
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