ITV has apologised after John Lydon said two extreme swearwords live on I'm A Celebrity... Get Me Out Of Here.
John Lydon and Jordan are the current favourites to win
ITV and media regulators Ofcom received 91 complaints by 1100 GMT on Wednesday, and the former Sex Pistols singer has been warned not to repeat the outburst.
An ITV1 spokeswoman said: "It was a live broadcast, so was unpreventable."
The broadcaster has now put into place a time delay of a few seconds so it can make sure no more surprise swear words go out on air.
Lydon's words came as presenters Ant and Dec revealed he had survived the latest eviction vote - which saw ex-athlete Diane Modahl leave the show.
After Lydon's fit of anger, presenter Declan Donnelly told viewers: "We are very sorry for that. It's a live show. We are incredibly sorry."
An ITV spokeswoman said: "We've no wish to offend viewers or mar their enjoyment.
building a very short time delay into transmission to enable us to bleep
The channel received 73 complaints from viewers, while Ofcom got 18.
Viewers' association Mediawatch UK - founded by Mary Whitehouse - said it was "sad" that ITV had to "resort to bad language and questionable activity to entertain our homes".
I'M A CELEBRITY... FAVOURITES
13/8 - John Lydon
10/3 - Jordan
7/2 - Kerry McFadden
4/1 - Lord Brocket
14/1 - Peter Andre
14/1 - Neil Ruddock
Source: William Hill
"A lot of people will be upset by it," chairman John Milton-Whatmore said.
"It was only a matter of time before one of the incumbents of the present series went off the rails and Rotten [Lydon] is in there for this sort of purpose."
"I think it is counter productive. People will eventually switch off."
Now in its third UK series, the show is proving more popular than ever with viewers. An average of 10.2 million people saw Tuesday's show.
The unpredictability and mix of characters - from Lydon to model Jordan, singer Peter Andre and disgraced aristocrat Lord Brocket - has been one of this year's selling points.
Lydon is still the bookmakers' favourite to win the contest, followed by Jordan and former Atomic Kitten star Kerry McFadden.
I'm A Celebrity... has also kept viewers hooked with a series of "Bushtucker trials" in which contestants have faced various nature challenges, some involving jungle wildlife.
Contestants, also including former BBC Royal correspondent Jennie Bond and ex-footballer Neil Ruddock, are spending up to 15 nights in a remote camp in the Australian rainforest to raise money for charity.
Bond is odds-on favourite to be voted out on Wednesday.