Jackass star Bam Margera is furious after film film critic Roger Ebert tweeted a message, blaming his co-star Ryan Dunn's fatal car smash on drink-driving.

Around 2.30am on Monday, Dunn, 34 was driving to his home in West Goshen, Pennsylvania, following a night out in a bar with friends when his sports car flew off the road.

Dunn was known for his stomach-churning stunts alongside American stunt performer Steve-O and comedian Johnny Knoxville on the MTV show Jackass.

Now his Jackass co-star Margera, 31, is outraged after Ebert criticised Dunn hours after the smash, which also claimed the life of another-as-yet unidentified male passenger.

Pulitzer Prize winner Ebert, 69, soon after the accident tweeted: 'Friends don't let jackasses drink and drive.' A link to a news story about the incident accompanied his comment.

Bam finally went to his Twitter to blast Ebert late last night, saying: I just lost my best friend, I have been crying hysterical for a full day and piece of s**t roger ebert has the gall to put in his 2 cents about a jackass drunk driving and [he is] one, f*** you!, Dailymail reported

Millions of people are crying right now, shut your fat f*****g mouth!, he added.

TMZ reported, that Dunn drank at least three light beers and three shots between 10.30pm and 2.10am at Barnaby's of America bar before the accident.

Twitter users are also furious by Ebert's remarks. One tweeter, @ebertchicago, responded: That was in disgustingly poor taste, while another added: Why is this a joke? He is still a person. Have some respect.

An article on Perez's blog read: We certainly agree that driving after drinking is wrong, we think there's no reason - especially RIGHT NOW - that anyone should be pointing fingers or poking fun at a truly tragic situation.

Everyone makes mistake, and this is somebody's son. Too soon, Roger.

But Ebert stuck to his guns, merely retweeting Hilton's article with the comment: Perez Hilton's readers agree with me and not with Perez about my tweet on Ryan Dunn.

He drank, he drove, 2 people died, said the report.

Police found the burning wreckage of Dunn's 2007 Porsche 911 GT3, that could reach a speed of 190mph, in the woods off the road fully engulfed in flames.