Aberystwyth Magistrates heard Rhian Jeremiah, aged 26, left teethmarks in the bodywork of the car – and was likened in court to villain Jaws in the James Bond movies.
Her astounded victims heard a “metal crunching” sound as Jeremiah’s teeth pierced the polished metal – causing £220 damage.
Car owner Selina Day, 23, and her two friends looked up through the sun roof to see Jeremiah biting the frame above the door.
Prosecutor Gerald Neave said: “Jeremiah approached the occupants of the Fiat at 2am after she had been drinking.
“She became aggressive and angry but the three people in the car could not understand what she was saying and drove off.
“They were parked outside a takeaway restaurant called Lip Lick’n Chicken when Jeremiah arrived and tried to wrench open the passenger door.
“She sank her teeth into the car’s frame between the roof and the door.
“The occupants could hear a loud screeching noise as she bit down on the roof.
“They could see what was happening through the sun roof.”
Magistrates heard Jeremiah had been drinking at a memorial night for her late boyfriend Simon Jones who drowned off the coast of Aberystwyth.
The court heard she was retracing his last known movements in Aberystwyth on what would have been his birthday when she bit the Fiat 500.
Car owner Miss Day told the court: “She came up to the car and tried to rip the door open.
“I couldn’t understand what she was saying – she was very drunk and was abusive.
“There was a bit of an argument and she sunk her teeth into the part of the car above the window. I could hear metal crunching.
“I had never seen this lady before in my life. I didn’t know what she was talking about.”
David Folland, defending, told the court the incident was “not quite like” the scene involving the character Jaws in a James Bond film.
He said: “My client was the worse for drink that night. She was clearly upset.”
Jeremiah denied causing £220 criminal damage to the car by biting it but was found guilty.
She also admitted assaulting two police officers who were called to arrest her for getting her teeth into the car.
Jeremiah was given a 12-month community order and told to attend 20 alcohol abuse help sessions.
Chairman of the bench Professor Ian Roffe told her: “You have used alcohol inappropriately to deal with your issues.”