An individual who becomes ensconced with rage after losing his train of thought during an anecdote, story, or sexual recounting. Often, immediately after interrupting himself, the dankwanker will toss objects and retreat to his hideaway for savage masturbation.
"Hey did that Davis guy ever finish his story?"
"No, that dankwanker just threw some change at us and stormed off!"
A person who lacks the ability to continue a story after being cut off in the middle of it. Generally a dankwanker will become unnecessarily angry and lash out at those close to him, so that he will then be left alone to relieve himself indignantly.
"Hey man, did your buddy just cuss you out and leave?"
"Oh, him? Yeah he's just being a little dankwanker today, he'll get over it."