Marco, who is the son of renowned chef Marco Pierre White, makes the sweeping statement during a conversation in The Pod about a holiday he once went on.
In scenes to be aired tonight (10 June), Marco reveals: "One summer holiday, I came back to London with no money, and my Dad says, 'You have spent a quarter of a million pounds in three months and what do you have to show for it?'
"I was like, 'f*** knows…I spent a quarter of a million pounds on prostitutes, cocaine and alcohol'."
The new series of Big Brother kicked off on Tuesday night and, in an exciting twist, there are two houses for the first time ever. Marco is among the contestants in the main house, while another group - called The Others - are secretly living in another house next door.
Tonight, Vicky Pattison's BFF Alex Cannon faces eviction, along with Laura Carter, Lateysha Grace and Andy West.
However, Big Brother hinted that the two housemates evicted tonight may not actually leave after all... You'd best tune in to find out what happens!
Big Brother, 9pm, tonight, Channel 5