Jack Osbourne says his father, Ozzy, is a terrible travel companion because he ignores the unwritten rules of the road.

The 30-year-old star – who currently stars in Ozzy and Jack’s World Detour along with his rocker dad – revealed the Black Sabbath artist isn’t ashamed to be a little disgusting while riding along.

He told the Daily Star newspaper: “There are road trip rules; if you fart in the car, roll the window down – he doesn’t do that.”

The 67-year-old singer has also dropped the ball in several other occasions, as he failed to provide Jack with directions while driving. He said: “I am dyslexic so I cannot read a map.”

This news comes after Sharon Osbourne had recently opened up about her struggles surrounding Ozzy’s sex addiction and affair. Needless to say, the Osbourne family has made it back to the spotlight thanks to their consistently controversial acts.

She stated: “He’s been an outpatient for sex addiction for the last three months, and after the tour he’ll be an inpatient for three months. And he’s working at it. It’s hard because it affects the whole family, and it’s quite embarrassing to talk about.”

And daughter Kelly doesn’t fall too far behind, either. The artist recently settled a lawsuit she was involved in with Ozzy’s former mistress, Michelle Pugh. Michelle pointed the finger at Kelly by accusing her of stimulating “controversy for the purpose of making money” after she leaked the mistress’ phone number online.

Michelle’s lawyer released a statement last week, saying: “The tweets have been removed and the lawsuit has been privately resolved. The resolution statement is mutual.”