A Tampa grandmother spent a night behind bars after she used some old-school discipline on her dirty-mouthed granddaughter.

Theresa Collier, 73, spent the night in jail with other inmates after she slapped her 18-year-old granddaughter in the face for using foul language.

When Collier's granddaughter Felicia used the f-word several times during an argument over doing homework, Collier had had enough.

"She uses the F-word like "the" and I know the kids that age use it all the time but it's not my language," Collier told WFLA. "So I got up and slapped her across the face, just as simple as that."

Felicia called the cops, and grandma was hauled away in handcuffs.

"So scary, just so scary," said Collier of her night in the big house. "They all came up to me, every one of them, wanting to know 'what are you in here for?'"

The charges were later dropped, but now Grandma Collier has a criminal arrest record.

She swears she'd do it again anyway.