A PUBLIC order "nuisance" with 124 previous convictions was exaggerating a disability to defend his behaviour, gardai have said.
Peter Sheridan (39) repeatedly dropped to his knees when officers went to investigate a complaint that he was hurling abuse at people on a city street.
He was found to be wearing knee pads when he was arrested and searched.
Sheridan, formerly of New Street, Dublin 8, was given a two-month suspended sentence by Judge Anthony Halpin at Dublin District Court.
He had pleaded not guilty to causing a breach of the peace at Doyle's Corner, Phibsborough on September 3.
Garda Robert Doorley said the accused was being a nuisance to the public, shouting and roaring abuse at people.
When the garda spoke to him, Sheridan was behaving as if he had "some sort of disability".
He was arrested and while being placed in the patrol van, he kept dropping to his knees.
The accused told the court he had suffered a bad fall, had been helped up by members of the public and a barman came out to give him a stool.
He needed to wear knee pads to protect his knees because of his frequent falls, he said.
Garda Doorley said he did not believe the accused was disabled "to the extent that he exhibits".
The court heard a consultant neurologist stated in a report that Sheridan displayed "Parkinsons-like behaviour".