There's a thread of redemption running through the story, and the main character's boisterous, anti-social acts -- while slightly glamorized -- do have some serious consequences.
The main character mercilessly beats up a man, punching his face (off camera), kicking and biting him, with bloody results. There's a brutal car crash, though mostly the aftermath is shown: a man has a piece of metal jabbed through his back and coming out his stomach. There are many other scenes of threats, yelling, insulting, and some more punching.
Dom appears naked, from behind for several seconds, and then in a long shot, from the side, with his penis visible for a second or two. In the opening scene, he receives oral sex while in prison, though off camera. In a very brief scene, he has sex with two women at once. Later, at a party, a woman is shown topless in several scenes. In a club owner's office, there is a wall decoration: a repeating video of two topless women (actually the same topless woman, filmed twice) playing ping pong. There's also quite a bit of innuendo.
"F--k" is used almost constantly in this movie. "S--t" is used a few times, as well as "c--k," "p---y," "dick," "balls," and "son of a bitch." Middle finger gestures are shown. English slang, such as "c--t," "bugger," smoking a "fag," and "don't give a toss," is used fairly often.
The main character drinks a great deal, mostly beer, but also whisky and champagne in certain scenes. He's very often raging drunk, and often angry while drunk. In one scene he complains of a terrible hangover and then begins drinking again. His daughter makes several sharp comments about his drinking. His best friend mostly drinks brandy, but does not seem to get drunk. In addition, he smokes many cigarettes, and a cigar in one scene. He also snorts cocaine on two occasions.