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The four mates didn't leave much to the imagination as they rode around the city on a horse drawn carriage, in the costume made famous by Sacha Baron Cohen's character, Borat.
Though their identity remains a mystery, the bizarre outfits were believed to have been for the purposes of a stag do and one of the mates was spotted with a tattoo of the England flag on his arm - giving away his nationality.
But it seems the joke didn't go down too well with locals, who weren't impressed by the sight of their hairy bodies.
Local police have labelled the group "indecent" and are now trawling through CCTV footage in order to find the quartet. The group was spotted last Friday.
Sebastian Glen, a spokesman for Krakow province police, said if the men are caught, they could be slapped with a 5000 zloty (£1,000) fine or potentially a month behind bars.
He said: "At the moment no one has been accused - we are still looking. There was a witness who says... they were speaking English.
"They could be Australian or from other countries in Europe who use English. So we don't know yet if they were British.
"It will not be easy to locate them. If they have already returned to their country it could be difficult."
Mr Glenn said that although incidents like this aren't common, rowdy Brits have made their presence known in the past.
He said: "We have many tourists in Krakow and this kind of behaviour is not common.
"Many of them come for the weekend and sometimes we have incidents connected to alcohol, like being too loud or fighting, but to be almost naked in a public place?
"That's not common at all. I remember a few years ago we had to fine some Englishmen who ran naked through the market square."
However, Mr Glen said the number of anti-social behaviour related incidents is relatively low in the city, considering the number of people who travel there every year for such festivities.
"Many British people come here for bachelor parties and they wear costumes for fun but it's very rare that they wear no clothes at all, so that's why it was so shocking for people to see four men on a carriage in the middle of the day almost naked," Mr Glenn added.
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