Acid (hip-hop) definition

(1) Having the characteristics of an acid

"An acid reaction"

(2) 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 vitriolic critique"

(3) Being sour to the taste

(4) Street name for lysergic acid diethylamide

(5) Any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt