Avril Lavigne's foul-mouthed tattoo

May 7, 2010, 16:31 GMT

Avril Lavigne and Brody Jenner have had another set of matching tattoos.

The couple - who had lightning bolts inked onto their skin during a trip to Las Vegas last month - requested more identical body art, getting the word 'f**k' etched onto their ribs at Mark Mahoney's Shamrock Social Club tattoo parlour in Hollywood.

A source told RadarOnline.com: "They were laughing and said they had not slept in two days. They were completely, utterly out of it.

"Then nobody could believe it when they said they wanted the word f**k written on their ribs.

"Avril didn't even care that the only person available to ink her in the shop was an apprentice. She just said, 'I don't care do it.'

"Neither of them seemed to stop and think about what they were doing, it was just one big laugh."

Although the couple - who began dating in February - opted to have their new tattoos in the same place this time, their previous set of inkings were on different body parts.

The 'Girlfriend' singer had her electric symbol etched onto her forearm, while the reality TV star opted for a design behind his ear.

Avril's new romance reportedly has the blessing of her former husband, rocker Deryck Whibley, who she split from last October, as they have remained friends since their separation.

A source said recently: "Avril and Deryck are just friends now. He thinks Brody is a good guy and that it's great the two of them are doing well."