\AK-rid\, adjective: 1 Sharp and harsh, or bitter to the taste or smell; pungent 2 Caustic in language or tone; bitter
harsh or corrosive in tone; "an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"
A secondary coffee taste sensation characterized by a predominantly piercing sour sensation on the posterior sides of the tongue Caused by higher-than-normal percentage of sour acids and a high concentration of salts Typified by an unwashed Rio coffee from Brazil