development hellion

An individual who, through an excess of inappropriate concerns, creative conflicts, or lack of expertise or discipline, systematically sidetracks and delays artistic or technical projects, effectively sending such projects to 'Development Hell.'

Also dev-hellion.

"Let's not put Tim on this project. It's on a strict timetable, and he's kind of a development hellion."

spaced in

Unusually focused in one's attention on a topic, often with great enthusiasm. Frequently in context of an altered state of mind. The opposite of spaced out.

S: How's your Bio studies going?
M: <expounds for several minutes on cellular respiration>
S: ...I see.
M: Sorry, I kinda spaced in.