Rock'n'roll singer Chubby Checker is suing HP over an app that used his name as a euphemism for penis size.

The Chubby Checker app - which appeared on websites for Palm OS devices - claimed to guess the intimate measurement based on shoe size.

Lawyers acting for the singer are seeking $500m (323m) in compensation, saying the app has done "irreparable damage" to his reputation.

HP said it removed the app as soon as it received a complaint from lawyers.

Lawyers for the 71-year-old singer - real name Ernest Evans - filed a "cease and desist" order against HP and its subsidiary Palm in September 2012, soon after the app became available.

Now they have launched a trademark infringement case against the two tech firms.

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"He's hurt," his lawyer Willie Gary told Associated Press.

"He worked hard to build his name and reputation over the years.

"We cannot sit idly and watch as technology giants, or anyone else, exploits the name or likeness of an innocent person with the goal of making millions of dollars."

BBC News