Whacker N. [University Of Maryland: From Hacker] 1.

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whacker n.

[University of Maryland: from hacker] 1. A
person, similar to a hacker, who enjoys exploring the details
of programmable systems and how to stretch their capabilities.
Whereas a hacker tends to produce great hacks, a whacker only ends
up whacking the system or program in question. Whackers are often
quite egotistical and eager to claim wizard status, regardless
of the views of their peers. 2. A person who is good at
programming quickly, though rather poorly and ineptly.