vinegary

Having the taste, smell, or nature of vinegar.

Unpleasant and irascible.

Figuratively, sharp; sour-tempered.

Having the character of vinegar; hence, sour; crabbed.

Having the nature of vinegar; sour; unamiable.

sour, like vinegar

acerbic, bitter

of a liquid, having turned partially or fully to vinegar.

having a sour disposition; ill-tempered

tasting or smelling like vinegar