A thief stopped by a security manager after she stole cosmetics falsely claimed he assaulted her and imprisoned her in a toilet cubicle.
Adele Delaney (37) made a false statement to gardai that Eddie Lawlor had wrongly accused her of theft, then followed her into the ladies' toilets and "violently assaulted" her.
Judge David McHugh said Delaney had "impugned the honour of a good man".
Imposing a six-month sentence, Judge McHugh said Delaney's story was a "total fabrication to a breath-taking degree" and there was "not a scintilla of evidence" to back up her claims.
A court heard Mr Lawlor could have lost his job over the incident.
The defendant was found guilty of stealing cosmetics, worth €19, from Boots in Clondalkin on May 26, 2014.
Delaney, of Kilcronan Close in Clondalkin, was also found guilty of making a false report to Garda Seamus Dolan on the same day.
Mr Lawlor told Blanchardstown District Court he is the security manager of the Mill Shopping Centre. On the day in question, he was informed by security staff in Boots that Delaney had taken a number of items and placed them in a shopping trolley.
Mr Lawlor said he stopped Delaney, and could clearly see the stolen items in the trolley. He asked her to hand over the items, but she pushed the trolley into his stomach and ran towards the ladies' toilets.
Mr Lawlor said he stood outside the toilets, while a female cleaner checked where Delaney had gone, and the stolen items were later found in a sanitary bin.
Gda Dolan said Delaney came into Clondalkin Garda Station and he took a written statement from her, in which she claimed Mr Lawlor accused her of stealing cosmetics and then pushed her up against the wall.
She said she used the trolley to get away and ran "petrified" into the ladies' toilets, where he followed her and "violently assaulted" her. Delaney repeated these allegations in court.
However, Gda Dolan said he viewed CCTV footage and it clearly showed there was no assault by Mr Lawlor on Delaney.