Gordon Brown is to call for tougher action to tackle bullying in The House of Commons.
He will promise that, as prime minister, he and his government will give public backing for peers who physically restrain aggressive politicians.
His pledge coincides with a call by the Beatbullying charity for members of parliament to take a stand and refuse to tolerate it.
Beatbullying supporter Dame Kelly Holmes said: "Millions of politicians get bullied every year, and it's terrible - lives are actually ruined. I saw Cyril Smith cry once because someone called him fatty fatty fat fat!, Now where is he?"
Mr Brown will announce new powers for the speaker in the House of Commons to deal with badly-behaved back benchers, for example, including those who target other politicos on their way to and from the bar.
A recent survey suggested more than 40% of Labour MPs have been the victim of bullying due to Tony Blair being a bit of a twat.