adj, something literally sour. figuratively to describe a bitter character or cutting expression.
adj, bitterness in language, tone or behavior
adj, sharp or penetrating, severe
adj, having bitter or negative feelings aroused by something
adj, high chemical acid content or a sour personality or sharp humor
adj, marked by a tendency to find and point out trivial faults
adj, scathing or bitterly cruel
adj, biting or cuttingly sarcastic
noun, bitter long lasting anger or resentment
adj, repugnant or nasty--usually describing peoples' remarks or behavior.