Verb: to talk profusely about meaningless or false information. Information believed to be pertinent or true by the speaker. This is usually associated with rapid, off target tangents referring to the speakers past, usually involving repeated allusions to time spent at a penitentiary, farm, or personal security business. It can also be loosely used to define a response to a question that in no way answers the question.
My teacher was becknering after someone accidentally brought up something about his past life.