expression, suru verb (irregular)
swallow a story; accept without questioning
Idiomatic expression for uncritically believing or accepting something, often used with information, explanations, or promises.
彼の言い訳を鵜呑みにするわけにはいかない。
I can't just swallow his excuse without question.
ネット
You shouldn't accept online information uncritically.
expression, suru verb (irregular)
swallow whole; gobble up; gulp down
Literal meaning of swallowing food without chewing, like a cormorant (鵜). Less common than the figurative sense.
鵜が魚を鵜呑みにする様子を見た。
I saw a cormorant swallow a fish whole.