Neat

1. Clean, tidy; free from dirt or impurities.
2. Free from contaminants; unadulterated, undiluted. Particularly of liquor and cocktails
3. (chemistry) Conditions with a liquid reagent or gas performed with no standard solvent or cosolvent..
4. (archaic) With all deductions or allowances made; net.
5. Having a simple elegance or style; clean, trim, tidy, tasteful.
6. Well-executed or delivered; clever, skillful, precise.
7. (Canada, US, colloquial) Good, excellent, desirable.

Antonyms

• (undiluted liquor or cocktail): on the rocks