The feeling of bewilderment, generally only achieved after the consumption of large amounts of ketamine. The subject of the confusionmay be identified by their incoherent ramblings, poor coordination and distorted (size) perception.
Person A: "My hands have disappeared"
Person B: "Nah mate you're just totally ketfused.com"
Acronym for "Kindly Shut The Fuck Up!". Implore a person to keep quiet immediately. Can be used to mean "please stfu" to lessen the blow or cushion it for friends. :)