Washington (AFP) – “Pirates of the Caribbean” star Johnny Depp was grilled about his history of drug and alcohol use as he took the witness stand for the third day on Thursday in his defamation case against his ex-wife, the actress Amber Heard. The 58-year-old Depp was also asked by Heard’s lawyers about trashing hotel rooms and text messages he wrote in which he referred to his former wife as a “filthy whore” and an “idiot cow.” Depp filed a defamation suit against Heard over a column she wrote for The Washington Post in December 2018 in which she described herself as a “public figure represe…