The presenter made an unfortunate error as he tripped over his words while reading out an email.
He was trying to say: “I regularly speak to clients about illness and pass the knowledge onto other clients as well.”
But instead, Bill ended up calling the “other clients”, “c***s”.
While Bill styled out the slip up, it was too late, as one eagle-eyed viewer had already captured the moment on video sharing site Vine.
Twitter also went into meltdown at meek and mild Bill’s colourful language:
It’s not the first time an incident like this has happened on the show though, as back in 2012 the BBC were forced to apologise when a voiceover man could be heard asking, "What the f*** is that?" during an item.
‘BBC Breakfast’ airs daily from 6am on BBC One and BBC News.