Define "hiccups" - Empty shelves? Insufficient medicines? Several hundred thousand extra unemployed? Major employers moving out of the UK? Recession far worse than seen in 2008?The practical problem the opposition face is Brexit turning out successful/popular after a few months of hiccups.
I mean, if it's just a few weeks of queues on the M20, it's a hiccup. If it's the Bank of England assessment of the impact of a disorderly or disruptive Brexit, it's a f***ing nightmare.