vinegarish (adj.)

• acerb
• acerbic
• bearish
• bilious
• bitter
• choleric
• crabbed
• cranky
• cross-grained
• crotchety
• dry
• dyspeptic
• green
• jaundiced
• ornery
• pickled
• pungent
• sec
• sour
• soured
• sourish
• tart
• unripe
• unsweet
• unsweetened
• vinegary
• waspish