Sour

inaccurate in pitch

showing a brooding ill humor

in an unpalatable state

smelling of fermentation or staleness

having a sharp biting taste

one of the four basic taste sensations; like the taste of vinegar or lemons

the property of being acidic

the taste experience when vinegar or lemon juice is taken into the mouth

a cocktail made of a liquor (especially whiskey or gin) mixed with lemon or lime juice and sugar

go sour or spoil

make sour or more sour