(NYPOST) — They’re 1 Percenter brats gone wild.

Students at the city’s most elite private schools are throwing such out-of-control, booze- and sex-fueled parties that at least one of the tony institutions, Horace Mann, is now begging parents to stop their kids from attending the bashes.

“Going to these events is not in your children’s best interests,” the administration warned in a recent letter about the parties, which often follow school-sponsored events, such as homecomings.

The wild parties are often dubbed “rando-fests” because the goal is to have sex with “randos” — code for “unattractive drunken girls.”

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