Proverb warning that rushing leads to poor results. Often used when someone tries to finish too quickly and makes mistakes.
They say haste makes waste, so do it a little more carefully.
The food I made in a hurry was a case of haste makes waste, and it wasn't very good.
A Japanese proverb formed from the adjectives 早い (fast) and 悪い (bad) in their classical volitional form ～かろう, literally 'if it is fast, it will be bad.'