Ok I thought I would add something funny here Saya, Next time you hear someone say to you, "the pigs are flying", or "when pigs fly", you can say back to them..."then the price of bacon will go up.."

I think you mean "when pigs fly" or "a pig flying to the moon" (the latter used here in the UK but I don't know if it's used in the US). If so, these phrases are used to convey a sense that something is never going to happen. For example, let's say I told someone "I'm going to quit smoking cold turkey", if the other person didn't believe me one bit then they could reply "yeah, you've got more chance of pigs flying to the moon".