Flesh out means taking something that's still just a skeleton -- an outline, a rough draft, a half-formed idea -- and adding the missing substance so it becomes something a reader can actually use. It shows up constantly in feedback on plans, decks, and proposals, and it has a few grammatical shapes that are each worth seeing on their own.
The examples below are grouped by shape and channel, so you can see the same core idea moving through a request, a passive comment, and a finished-result adjective.
Direct request, with a pronoun object
Manager comment on a draft: "Good start -- now flesh it out with a few concrete numbers before Thursday."
Slack message: "Can you flesh this out a bit more? Right now it's just three bullet points."
Peer feedback: "I like the direction. Flesh it out and send me the next version."
Notice the pronoun sits between "flesh" and "out" in every one of these -- "flesh out it" never appears in natural English.
Direct request, with a full noun phrase
Editorial note: "Please flesh out the second section before we share this with the client."
Alternate order, short object: "Flesh the intro out a bit -- it ends too abruptly."
With a full noun phrase, both orders are grammatical, but the non-separated order ("flesh out the second section") is the more natural default, especially as the object gets longer.
The "with" collocation
Coaching note: "This case study needs to be fleshed out with real numbers, not just a general description of the results."
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Start learning for free →Proposal review: "Flesh out the roadmap with specific dates -- right now it just says 'Q3' and 'Q4.'"
"With" is the default preposition for naming what gets added -- data, examples, a timeline, specifics.
Passive voice, flagging missing work
Status update: "The pricing section hasn't been fleshed out yet -- we'll have it ready for the review on Friday."
Meeting note: "The roadmap will be fleshed out during the offsite next week."
Passive voice is a natural, common way to flag that something is incomplete without naming who's responsible for finishing it.
The fleshed-out adjective
Approval comment: "Send it back once it's fully fleshed out -- right now it's still too thin to share externally."
Recommendation: "This is a well-fleshed-out proposal. I have no notes on the level of detail."
Predicative use after "be" ("the plan is fleshed out") doesn't take a hyphen; attributive use before a noun ("a fully fleshed-out plan") does.
What these examples have in common
Every sentence above is doing the same job -- naming a piece of work that's directionally right but too thin, and asking for or reporting on the missing substance. What changes is only the grammatical shape: a direct request with a pronoun or noun object, the "with" collocation naming what gets added, the passive form that flags incompleteness without naming who's responsible, and the adjective that describes the finished result. Once you can move between these shapes, "flesh out" stops sounding like a single fixed phrase and starts sounding like the natural, flexible verb it actually is.
Practice scenarios
Practice using flesh out in situations like:
- giving feedback on a draft that's directionally right but too thin
- flagging incomplete work in a status update without naming who's responsible
- describing a finished, detailed proposal using the adjective form
Useful practice phrases:
- "Flesh it out with a few concrete numbers before Thursday."
- "This section hasn't been fleshed out yet."
- "Send it back once it's fully fleshed out."
The grammar around "flesh out" changes with the moment -- request, passive report, finished-result adjective -- but the core meaning never does.
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