This is the sort of prank you can play with Apple's Siri on the iPhone.
The Telegraph UK wrote
Charlie Le Quesne was trying out the iPhone 4S at a Tesco store in Coventry when it told him: "Shut the f*** up, you ugly t***.
The boy had been using the phone's Siri system – which answers spoken questions – and had asked it: "How many people are there in the world?It seems someone used the ugly seven words as a name and that innocent question pop the name up.
Tesco has send the bad-mouthed iPhone back to Apple for to wash the mouth piece with a little soap.