Speaker Greg Fergus kicked Conservative Leader Pierre Poilievre out of the question period Tuesday after a particularly nasty exchange with Prime Minister Justin Trudeau.

Poilievre's day-long removal from the House of Commons came after he called Trudeau a "wacko" for supporting B.C.'s past policy of decriminalizing some hard drugs in an attempt to reduce the number of overdose-related deaths.

Poilievre said it was a "wacko policy" backed by "this wacko prime minister." Fergus asked him to withdraw the "unparliamentary language."

Poilievre refused, saying only that he agreed to replace "wacko" with "extremist" or "radical." Poilievre's refusal prompted Fergus to remove him.

"There are a couple of things that are going on here today that are not acceptable," Fergus said.

He later called it a "remarkable question period" after MPs from all sides yelled at one another and called each other names.

Following Poilievre's removal, the Conservative caucus left the Commons chamber en masse, following their leader.

Trudeau fielded a few more questions Tuesday from Bloc and NDP MPs and then left the chamber after the fracas.