Students from exclusive Melbourne private school Xavier College were "blind drunk" and terrorising the school's Kew neighbours as "muck-up day" today led to the mass suspension of Year 12 classes and a student taken to hospital.

With only days left in the school year and weeks until final exams, Xavier sent home up to 250 students. A brief statement by the school this afternoon said "a large number of Year 12 students exhibited unacceptable behaviour".

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The mass suspension came on "muck-up" day, students who called The Age said, as seniors' celebrated their final school days before breaking to prepare for exams next month.

A Kew resident told The Age he called the school about 3pm today because Xavier students were "blind drunk" in the street, drinking from wine casks and "urinating all over the neighbours' houses".