A bad knife cuts one’s finger instead of the stick.
More Portuguese Proverbs:
A goose, a woman, and a goat, are bad things lean.Portuguese
Jack of all trades and master of none.
Portuguese
He made me mad. To see him shine so brisk and smell so sweet.
Portuguese
Better is my neighbour's hen than mine.
Portuguese
Iron that is not used soon rusts.
Portuguese
You have to suffer a lot or die young.
Portuguese