Pronunciation: /wɛn pɪɡz flaɪ/
noun a word used to identify any of a class of people, places, or things
A1 My grandma says she'll start using a smartphone when pigs fly.
A2 The boss promised a pay raise when pigs fly.
B1 I'll believe it when pigs fly.
B2 The chances of that happening are slim, it'll happen when pigs fly.
C1 The project will be completed on time when pigs fly.
C2 The politician's promises will be fulfilled when pigs fly.
adverb a word that modifies a verb, adjective, or other adverb, indicating the time, place, manner, or degree of an action
A1 I will believe it when pigs fly.
A2 She said she would finish her homework when pigs fly.
B1 He promised to clean his room when pigs fly.
B2 The project will be completed on time when pigs fly.
C1 The company will reach its sales target when pigs fly.
C2 The government will reduce taxes when pigs fly.
formal It is highly unlikely that the project will be completed on time, it will be done when pigs fly.
informal You think I'll lend you my car? Sure, when pigs fly!
slang As if I'll believe that story, when pigs fly!
figurative I'll start enjoying running when pigs fly, it's just not my thing.
when pigs flew
when pigs fly
more likely than when pigs fly
most likely when pigs fly
when pigs fly
will happen when pigs fly
has happened when pigs fly
is happening when pigs fly
when a pig flies
as likely as when pigs fly
to see pigs fly
enjoying when pigs flying
the flying pigs