An unrepentant Prime Minister Boris Johnson brushed off cries of "Resign!" and dared his foes to try to topple him Wednesday at a raucous session of Parliament, a day after Britain's highest court ruled he acted illegally in suspending the body ahead of the Brexit deadline.

Amid shouts, angry gestures and repeated cries of "Order!" in the House of Commons, Johnson emphatically defended his intention to withdraw Britain from the European Union on Oct. 31, with or without a separation agreement with the EU.

"I say it is time to get Brexit done," he declared, accusing his opponents of trying to frustrate the will of the people, who in 2016 voted 52% to 48% to leave the 28-nation bloc.

Johnson was greeted with applause from his own Conservative lawmakers and jeers from the opposition side as he arrived in the Commons, hours after cutting short a trip to the United Nations in New York.

He flew home early after Britain's Supreme Court unanimously ruled Tuesday that his attempt to suspend Parliament for five weeks had the effect of stymieing its scrutiny of the government over Brexit. The court declared the suspension void.