come out of left field
To originate from a surprising or strange place. ("Left field" is the metaphorical origin of something uncommon, unpopular, or otherwise strange.) That suggestion certainly came out of left field! How did you come up with that one? Most of my aunt's ideas come out of left field, but you have to love her enthusiasm! I know that idea came out of left field, but I think it could actually work!
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.