Danny Mills ruthlessly called Manchester United 'sh*t' on Sky Sports News, not knowing he was live on air.
Mills joined Pete Graves and Sol Bamba on Sky Sports for The Football Show on Wednesday.
They spoke about last weekend's results in the Premier League, including Man United's crushing 5-0 loss to Liverpool.
Defensively speaking, Man United were all over the place as the visitors raced into a four-goal lead in the first half.
And Mills didn't hold back when assessing Man United.
But he wasn't aware he was on air, saying: "Basically United are sh*t."
Presenter Graves and fellow pundit Bamba laughed off his comment, with the former Leeds United man attempting to justify himself before the broadcast went to an ad break.
Footage of Mills savagely slamming Man United emerged online.
The fall out from their humiliating defeat at Old Trafford continues, with Paul Pogba rubbishing claims he did not speak to Solskjaer following the game.
He shared an image of an article about himself, with the words 'fake news' accompanied with the caption: "Big lies to make headlines."
Pogba, who was sent off against Liverpool, has been the subject of intense transfer speculation ahead of his current contract expiring at the end of the season.
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