acidulous          
adjective uk/əˈsɪdʒ.ə.ləs/ us/əˈsɪdʒ.ə.ləs/
 带酸味的;味道刺激的
sour or sharp in taste
  a fruit drink with a pleasantly acidulous taste 带有宜人酸味的水果饮料 
  尖刻的;带讽刺意味的
sharply critical or cruel
  an acidulous portrait of the candidate 对这名候选人尖酸刻薄的描述