Little bit touched
used to describe someone who is not quite right in the head
Person 1: Blair's upstairs bragging to his female co-workers that he has VIP tickets to Sexpo
Person 2: So?
Person 1: He's offended that they're treating him like a dirty old man
Person 2: That Blair's a little bit touched isn't he
Person 2: So?
Person 1: He's offended that they're treating him like a dirty old man
Person 2: That Blair's a little bit touched isn't he