An analytical thinker. The left-brained thinker. The mystery-solver. The solution-finder. The lefty's mind thinks more like a computer than a human. A lefty will not rest until they find the answer to the problem, because in their mind there is no peace with "I don't know"!
(v) I can't keep up with him, he's way too lefty for me!
(n) Lefty just figured out what was wrong with the car.
A term used to describe someone who looses track of what they're talking about and jumps onto another subject with little or no warning. A similar phenomenon as the disorder ADD or ADHD, but not so bad as to need the medication. Often this will happen in a run-on sentence.