Pile up pillows and cushions that you can hit with all your strength. Take a deep breath and then use your fists and feet to hit and kick as hard as you can as you breathe out.
Ideally do this somewhere where you won’t be disturbed (and where you won’t disturb those around you). Let yourself go, shout, yell and insult the cushions. Repeat the exercise as many times as necessary to get rid of your pent-up anger.
Remember, you simply need to make contact with the energy of the "injured child within you" and to have the courage to cross the "ridicule barrier". You will find this exercise is extremely salutary and has a number of benefits.
On the same basis, you can unburden yourself by writing "anger letters". For example, you can keep a sort of journal where you write down everything that sickens you and makes you angry.