flesh out

flesh out  {v.},  {informal}
1. To add to; make fuller, bigger, or longer.
The author fleshed out his story by adding more about his war experiences.
2. also flesh up
To become heavier, put on weight, or flesh.
He lost weight after his illness but is beginning to flesh out again.
See: FILL OUT.
Categories: informal verb

'flesh out' on video