"___ pigs fly!" (4)
I believe the answer is:
when
(Other definitions for when that I've seen before include "Over what period?" , "At what time?" , "Say it when you''ve had enough" , "As soon as" , "stop pouring the drink" .)
I believe the answer is:
when
(Other definitions for when that I've seen before include "Over what period?" , "At what time?" , "Say it when you''ve had enough" , "As soon as" , "stop pouring the drink" .)