NEAT

noun

1. An artificial intelligence researcher who believes that solutions should be elegant, clear and provably correct. Compare scruffy.

adjective

1. Clean, tidy; free from dirt or impurities.
2. Free from contaminants; unadulterated, undiluted. Particularly of liquor and cocktails; see usage below.
3. Conditions with a liquid reagent or gas performed with no standard solvent or cosolvent.