To dream of a mallet, denotes you will meet unkind treatment from friends on account of your ill health.
Disorder in the home is indicated.
If you dream of a mallet as used in a game of croquet then you will find the love of your life is willing to wed you.
To see a mallet (doing nothing) shows that you will be treated badly while in ill health.
To swing a mallet yourself shows domestic disharmony.