Men who feel the need to be overly aggressive to the point of being rude or just plain stupid. They feel this need as a means of compensating for their lack of manhood in the trousers.
When his dad went and punched the hockey ref, it was a pure show of small-dickedness!
A small little kid, usually blonde haired, who enjoys irritating others and in general considers himself an all around pro, when in actuality he is the exact opposite.