At one of her last PMQs as prime minister, Mrs May said that Mr Corbyn was “all mouth and trousers”.
Many people took to social media to point out that she had fudged the line in the heat of the moment, which should have been: “all mouth and no trousers.”
It followed Mr Corbyn asking Mrs May in the Commons if she could confirm that the EU had ruled out renegotiating the backstop.
Mrs May responded by saying everyone knows what the EU agreed, adding that on key votes Labour voted for no-deal, before she said: “Absolutely typical of the right honourable gentleman. All mouth and trousers”.
Many took to Twitter to ridicule the mistake, although some argued that Mrs May may have got the line right.
Some posted memes and gifs to mock the image of Jeremy Corbyn as “all mouth and trousers.”
Simon Maginn wrote on Twitter: “’Corbyn is all mouth and trousers’ shrieks an increasingly confused MP.”
Columnist Kirsty Strickland said: “May says Corbyn is ‘all mouth and trousers’ dear lord make it stop.”
Nick Eardley joked that the line “conjures up quite an image”.
Labour MP Liz McInnes said: “I rather suspect that the Prime Minister’s odd use of the phrase “All mouth and trousers” might be the result of a bet.
“If Jeremy Corbyn had come back with its female equivalent of “Fur coat and no knickers” all hell would have been let loose.”
“Oops, Prime Minister to Jeremy Corbyn “Typical of the Rt Hon gentlemen, all mouth and trousers!” Frankly, most of us are very glad he’s wearing them,” said Labour MP Rosie Duffield.
However, others came to Mrs May defence saying “It’s regional. Where I grew up it was “all mouth and trousers.”
Mark Gregory said: “The phrase is definitely “all mouth and trousers”, and Theresa May was right.”
“The phrase was originally “all mouth and trousers” – ie good presentation but no substance,” Tom Freeman wrote. “After a couple of decades it shifted to “all mouth and no trousers.””