The Warehouse in Lyall Bay found stained clothes for days after two friends decided to cheer themselves up by squirting mustard around.

A prank to honour a dead friend's sense of humour didn't turn out so hot for Warehouse shoppers.

Shelley Cheriton, 20, and a friend went into the Lyall Bay Warehouse in Wellington in March shortly after a close friend's funeral.

To cheer themselves up they took bottles of mustard from the food section and began squirting them around the clothing section, soiling many items on display.

Even running out of mustard did not stop them. They went back to get more bottles before continuing their behaviour.

Shop security noticed and approached them, but they ran off after shouting abuse.

Shoppers trying on clothes then began approaching the assistance desk complaining their own clothes were soiled.

For several days shoppers continued to find more and more soiled items of clothing.

Cheriton pleaded guilty to wilful damage in Wellington District Court on Friday and was ordered to repay the $1496.11 for 67 damaged pieces of clothing.

Cheriton told police they had simply wanted to cheer themselves up and thought it was the kind of prank their dead friend would find funny.