When pigs fly.
Pronunciation: /wen pɪɡz flaɪ/
What does “When pigs fly” mean?
Never. Used to say something is impossible or will never happen.
Example
He'll clean his room when pigs fly.
More phrases to watch
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I'm here for you./aɪm hɪr fɔːr juː/
What do you take me for?/wʌt duː juː teɪk miː fɔːr/
Love is blind./lʌv ɪz blaɪnd/
Never been better./ˈnevər bɪn ˈbetər/
I'm spoken for./aɪm ˈspoʊkən fɔːr/
Lie to my face./laɪ tuː maɪ feɪs/
Why didn't you say so?/waɪ ˈdɪdnt juː seɪ soʊ/
Till death do us part./tɪl deθ duː ʌs pɑːrt/