David Letterman’s Cue Card Guy FIRED … For Attacking Writer

breaking news

David Letterman‘s well-known cue card guy on “Late Show” was given the boot this week … after he cussed at the well-known TV host backstage — then attacked one of the writers.

Tony Mendez says he was given the boot this week over an incident that took place on Thursday … but the real problem started the day before during a dry run for the show — according to the NY Post.

Tony says he’s had a problem with show writer Bill Scheft for a long time … and during the dry run he snapped when Scheft interrupted his convo with Letterman — so he told the writer to get off his back.

But when Letterman got mad at him for it Tony snapped … telling Dave, “You’re the one who has a sour disposition, mother****r.”

Tony claims he was stewing all night over what happened … and when he came into work the next day he immediately approached Scheft, then rougly grabbed him by the shirt.  Sources told the Post he threw the writer up against a wall.

He was immediately removed from the building and terminated from his position — but existing severance … his full salary and shape insurance in anticipation of the show ends in May.

But the well-known cue card guy says he not gonna hold a grudge against Dave over this, adding, “He is the best, the most generous boss I have ever had.”