Derived from a mistake when a pot-smoking barista attempted to craft and hand off a Starbucks "quad grande cappuccino" and slurred his words (presumably because he was stoned as usual), calling the drink a "Quande," "Quande" refers to pot, weed, marijuana, Mary Jane.

It may also be used as a verb, i.e. "to quande" or a past participle adjective, i.e., "I got Quanded"
My texts made no sense because I was quanded when I sent them.