This is acombination between a 'crusty' or old person, and the word 'cunt'. Used to show a dislike for old people, specifically those who demand a seat on a bus.
A combination of the terms krump and turnt, which refers to a condition of partying beyond dancing and drinking. A state of krunt-ness implies not only the act of partying intensely but also an attitude of disproportionate pleasure at the mere idea of substituting partying for caring.