llenarse de zozobra 23
Apart from the fact that it is not locution and is perfectly understood by filling ('to fill"), it is (reflexive pronoun), anxiety (by the figurative sense "restlessness of the mood in the face of a danger"), it is as if it were a synonym in 'staying in saloon' ("to be in shame, in evidence, isolated"), which sounds strange, but it is not locution either.