Boris Johnson has said the Irish backstop has "got to come out" of Britain's Brexit deal.
The former UK foreign secretary has said the withdrawal deal by British Prime Minister Theresa May is "deceased".
He also urged her to return to Brussels, as rescinding Article 50 is "pathetic".
He made the comments during a speech in Staffordshire, in which he urged Mrs May to use Brexit to unite Britain.
Mr Johnson said it was a waste of time attempting to bring more people to the table over the current "ex-deal", but also made his position on extending or revoking Article 50 clear.
Article 50 is the section which allows member states to leave the European Union, giving two years to negotiate a deal. It was triggered by Mrs May in March 2017.
Mrs May lost a vote in the House of Commons for her proposed Brexit deal on Tuesday evening, and she has until Monday to bring back a new plan to MPs.
Mr Johnson said: "The deal was thrown out by a record 230 votes.
"That was for the very good reason that it does not correspond to the result of the 2016 referendum.
"When 118 Tory MPs voted against this now deceased withdrawal agreement it was because leavers and remainers were united in the dismay of a deal which keeps us locked in customs union, unable to do free trade deals, cut tariffs on own, make food cheaper, help African farmers and turn us into non-voting members of the single market."
Boris Johnson speaking at the headquarters of JCB in Staffordshire, England | Image: Peter Byrne/PA Wire/PA Images
He said it was "overwhelmingly likely" Britain would get a free trade deal from the EU citing "positive noises" coming from Germany.
He said her main concern should be to have the backstop on the island of Ireland removed and use the transition period to come up with a new trade deal.
He added: "She can go back to Brussels, and she should go back to Brussels and say that the British House of Commons doesn't accept the democratic consequences of the arrangement you have imposed in the form of the backstop.
"It's got to come out."
Mr Johnson added: "To put a tiger in the tank we should withhold at least half of the stg£39bn until the deal is concluded.
"If we mean it and we are determined and we now say this is the best and final offer, I will be amazed if we cannot get a deal in those terms."
Mr Johnson rejected the idea of a snap election saying it was "not the right way through".
He said: "I think most people in this country feel they have had quite enough elections. I certainly do."
