flesh out

US /ˌfleʃ ˈaʊt/
UK /ˌfleʃ ˈaʊt/
"flesh out" picture
1.

desarrollar, detallar, dar forma a

to add more details and information to something to make it more complete or substantial

:
We need to flesh out this idea before presenting it to the client.
Necesitamos desarrollar esta idea antes de presentarla al cliente.
The author took time to flesh out the characters in her novel.
La autora se tomó su tiempo para desarrollar los personajes de su novela.