Naughty Norris first started pilfering from local residents around a year ago – dragging food taken from bins through his cat flap.
But his crime spree soon escalated and he started stealing bras, knickers, pants, T-shirts, dusters, gloves, dish cloths and boxer shorts.
He has also come back with unopened tube of gravy paste, a German sausage, baby clothes and someone’s running kit – and even a bath mat and towel set.
Two-year-old Norris has amassed such a huge pile of knickers his owners have red-facedly delivered letters to residents admitting they may have of some of their property.
Norris brings most of his hoard through the cat flap – but if it can’t fit through he leaves it on the mat outside.
Owners Richard and Sophie Windsor, of Bedminster, Bristol, reckon Norris is trawling washing lines for his ill-gotten gains.
Richard, 26, a graphic designer, said: “He was perfectly well behaved up until the age of one, then he started to turn to a life of petty crime.
“He first started bringing things in from the recycling bins when he was about one. At first it was just the odd thing – but over the last four months, he has really started to up his game.
“Initially it was dusters and dish cloths but this has now intensified to clothes, including bras, pants, T-shirts and jumpers.
“We have even had a pair of washing-up gloves – each brought in on a separate night. He goes out in the evening and then returns quite late on or in the early hours.
“He brings his stolen items in and then meows and meows to announce he is back so we will go and see what he has brought in. Sometimes he will go out multiple times during one night."
The couple are now trying to reunite the items with their owners after collecting a huge stash of Norris’ stolen goodies in a special cat swag bag.
They delivered letters explaining Norris’ naughty habit, appealing to anyone who was missing items from their washing line to get in touch.
“So far we have been able to reunite a number of items – including a towel set, some oven gloves, a bath mat, some baby clothes and some running gear – with their owners.
“Fortunately all our neighbours have been very good natured about it and think it is funny. At least now they know where to come if something disappears mysteriously.”