"You're behaving like the mafia, like we're a hostage. We're not - we're free to go," Mr Farage said.
It came as the EU parliament set out its "red lines" on negotiations for a Brexit deal during the debate.
Representatives for the 27 member states are expected to back a call by EU leaders for the bloc to first agree to divorce terms before striking any new trade deals.
Jean Claude Juncker, the president of the European Commission, has previously suggested Britain would have to pay a Brexit "divorce bill" of up to £50bn in liabilities, and pledged funding.
"We want to have a clear signal that the European Union is united," German MEP Manfred Weber, the head of the conservative European People's Party (EPP), told AFP.
"London must understand that no splitting up of the EU position is possible," Weber told reporters on Tuesday.
/The Telegraph/
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