The 21-year-old star - who is currently dating SCUM rocker Thomas Cohen - took a trip to a theme park with her unnamed lover and disaster struck when she boarded a daring ride shortly after eating.
She said: "I was on a date with a boy at Alton Towers and I vomited on him on a roller coaster. It wasn`t good.
"Luckily, we`d been dating for a year so he didn`t mind as much as he should have.
"My advice would be not to over-eat before riding on roller coasters."
Peaches also admitted she has a number of bad habits, including not washing her hair or clothes as often as she should.
She added: "What`s my worst habit? Where should I start? Chewing my nails, wearing the same socks three days in a row, not washing my hair enough- although I`ve got it short at the moment so I have to wash it daily otherwise it looks disgusting."