尖酸

harsh / scathing / acid (remarks)

point (of needle) / sharp / shrewd / pointed

pointed; tapering; sharp / (of a sound) shrill; piercing / (of one's hearing, sight etc) sharp; acute; keen / to make (one's voice) shrill / sharp point; tip / the best of sth; the cream of the crop

sour / tart / sick at heart / grieved / sore / aching / pedantic / impractical / to make sarcastic remarks about sb / an acid