Slate was doing a biker chick talk-show skit with co-star Kristen Wiig when the curse word fell. “You know what? You freakin’ just threw an ashtray full of butts at my head,” Slate told Wiig. Then the rookie cast member got a little too in character, adding; “You know what? You stood up for yourself, and I f—– love you for that.”

Realizing her mistake, a look of panic came over her face.

While SNL aired live on the East Coast, producers bleeped Slate’s mistake with “freakin’” for West Coast airings.

“No truth to firing conjecture,” NBC spokeswoman Sharon Pannozzo said. “She will not be fired.” Still, show executives were less than thrilled about Slate’s slip and had a big meeting after the show, a source told the New York Daily News.

“It was a very big deal that the F-word hit the air,” the source said. Because the slip up occurred about 12:40 a.m., well after prime time, “SNL” is not expected to face fines from the Federal Communications Commission.

Slate did not attend SNL’s swanky after-party at Pranna on Madison Ave.