Warning: graphic language

The O'Farrell government's whip in the upper house has become a minor sensation on Twitter this afternoon, attacking other users, telling one to "go fuck yourself" and declaring himself the "Marieke Hardy" of the Right.

Spot the difference ... Marieke Hardy, left, and "the Marieke Hardy of the Right".

Peter Phelps, a member of the hard right of the NSW Liberal Party, who notably once described traffic lights as a "Bolshevist menace", joined the social networking site less than a month ago with some trepidation.

On November 25, he tweeted: "I have a feeling this may not be a very good idea, but my GenY staffer tells me that it is essential to have Twitter. Hmmm..."