once in a blue moon
once
wʌns
vans
in
ɪn
in
a
ə
ē
blue
blu
bloo
moon
mu:n
moon

Definitie en betekenis van "once in a blue moon"in het Engels

once in a blue moon
01

used for saying that something can only happen on very rare occasions 

once in a blue moon definition and meaning
idioom
informeel
Voorbeelden
I go to the cinema once in a blue moon. 
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