movie on a lunch lady who stole immunition

For burger-joint employee Tammy, a bad day keeps getting worse. She wrecks her car, loses her job, and finds that her husband has been unfaithful. It's time to hit the road, but without money or transportation, Tammy's options are limited. Her only choice is a road trip with her hard-drinking grandmother Pearl, who has a car, cash, and an itch to see Niagara Falls. It's not the escape Tammy had in mind, but it may be what she needs.

Tammy is an American sitcom, starring Debbie Watson in the title role. Produced by Universal City Studios, 26 color half-hour episodes were aired on ABC from September 17, 1965 to March 11, 1966. Tammy was loosely based on the three Tammy films; Tammy and the Bachelor starring Debbie Reynolds; Tammy Tell Me True; and Tammy and the Doctor both starring Sandra Dee. The films themselves were adaptations of novels by Cid Ricketts Sumner. The series was also partially influenced by other rural themed TV sitcoms such as The Beverly Hillbillies. In particular, there are similarities between Tammy's Cletus Tarleton and The Beverly Hillbillies' Jethro Bodine.