What is the origin of the idiom 'If pigs could fly'?
in Ireland that term was given to show the impossible.
The phrase "when pigs fly" is a response equal to "it will never happen", or "I will never do it". The fact is that pigs (large and heavy creatures) are never likely to gain the power of flight, so it is equally unlikely that the activity will ever occur. Nearly synonymous is the phrase, "when Hell freezes over". Example (here used as sarcasm): "Do you think I could win the race?" "Sure...when pigs fly."
1. This is not an idiom - an idiom is when you cannot figure out the meaning of the phrase by just defining the words. You can figure out what this phrase means by the words and context. 2. It's not pugs, which are a type of dog. It's WHEN PIGS FLY. 3. You use this phrase whenever you think whatever something is not at all likely to occur