A phrase commonly used by Indian teachers/judgmental relatives who think they have the right to criticize any tiny action you make. Also similar to:
"aRe YoU oN yOuR SenSes!?"
"tHiS iS UnAcCepTaBl!"
Teenager: Comes home 5 minutes late
Judgmental Auntie: "wHat Is tHiS BeHavIor?!"
Student: Whispers to their classmate
Indian Teacher: "aRe YoU oN YOuR SenSes!?"