I heard that
This expression is used to confirm with another person something that the speaker heard previously from a third party or learned about from some other source.
The shortened form 다며? can be used among close friends and acquaintances.
This expression cannot be used to describe something that the speaker directly saw or experienced, nor can it be used to restate or reconfirm what another person has just said.
Used to confirm with another person something that the speaker heard previously from some other source.
When attached to nouns, the (이)라면서(요) form can be used instead.