- improperly baked.
- imperfectly made.
Origin of slack-baked
First recorded in 1815–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for slack-baked
The pound of bread was not much larger: it was made of barley, slack-baked, and very dark, though sweet.