out of left field
Uncommon, unpopular, or otherwise strange. Well, that suggestion is certainly out of left field! How did you come up with that one? Sure, my aunt is really wacky and often out of left field, but I love her to pieces!
out of left field
suddenly; from an unexpected source or direction. (See also out in left field.) Most of your ideas are out of left field. All of his paintings are right out of left field.
out of left field
mod. suddenly; from an unexpected source or direction. All of his paintings are right out of left field.