Jeremy Corbyn has been urged to "apologise or clarify" what he was saying after being accused of mouthing "stupid woman" at Theresa May during Prime Minister's Questions.
Video showed the opposition leader saying something under his breath after the Prime Minister likened Labour's attempt to table a no confidence motion in her to a pantomime.
The Labour leader has been criticised by MPs from both sides of the House of Commons over the footage.
Conservative former minister Sir Patrick McLoughlin used a point of order during PMQs to accuse Mr Corbyn of having "muttered" that Theresa May was a "stupid woman".
Cries of "shame" and "disgraceful" were heard from the Tory benches at this point.
Sir Patrick added: "Would it not be appropriate for him to come back into this chamber and apologise?"
Watch: Jeremy Corbyn making a statement in House of Commons after he appeared to mouth 'stupid woman' at Theresa May
Speaking in the House later on Wednesday, Corbyn denied the accusations stating that he said "stupid people".
"Thank you for your invitation to make a short point to the House. I am very happy to do and I have come immediately to do that," he said.
"During Prime Minister's Questions today, I referred to those, who I believed were seeking to turn a debate about the national crisis facing our country into a pantomine, as stupid people.
"I did not the words 'stupid woman' about the Prime Minister or anyone else, and I am completely opposed to the use of sexist or mysognistic language in absolutely any form.
"I am happy to place that on the record at your request this afternoon."
However, Labour MP Stella Creasy, who has talked publicly about misogynist abuse she has faced on social media, wrote on Twitter: "This is not ok.
"PMQs is a hotbed of emotions but I hope that Jeremy will accept this kind of behaviour isn't his normal good nature or what we expect of progressive men #21stcenturycalling"
'You called me a stupid woman'
Watch: Leader of the House Andrea Leadsom questions Speaker John Bercow about calling her a 'stupid woman'
Leader of the House Andrea Leadsom used the point of order to call out Speaker John Bercow for failing to apologise when he was found to have called her a "stupid woman".
Speaking during PMQs, she said: "Why is it when an opposition member found that you had called me a stupid woman, you did not apologise in this chamber?"
Speaker Bercow responded saying he had "dealt with that matter months ago".
He said: "I dealt with that matter months ago in remarks that I made to the House of Commons, to which the right honorable lady in our various meetings since has made no reference and which requires from the chair today no elaboration whatsoever."