Difficult to realise that this was amongst the first films released with an X certificate.It was probably to ensure that impressionable teenagers did not have the opportunity to copy the antics of the characters in this film.Joan Collins shines amongst the dross.Having seen her boyfriend is beaten up by a gang.She then goes with the leader of the gang who treats her roughly.He also has a huge Oedipus complex,and almost seems to be doing a rather poor impersonation of James Cagney in White Heat.There are also parts of this film which are reminiscent of Brighton Rock and The Blue Lamp.The gang stages a raid on a wrestling arena which goes wrong.The leader shoots a member of staff.Subsequently they have a discussion about who would go down for the crime which clearly reflects the Derek Bentley case.The climax is so overblown it is quite laughable.

Although the play Cosh Boy never made it to Broadway, probably too British in its subject matter, the original actor who played the lead on the London stage got to recreate his role for the screen. In the tradition of Richard Attenborough in Brighton Rock, James Kenney is mesmerizing and unforgettable as the dirty little punk who with his gang robs little old ladies of their monies.If anything Kenney is far more loathsome than Attenborough, not even a hint of surface charm. In fact the hardest part of the film to take seriously is having young Joan Collins surrender herself and her virginity to this creep. Still his love 'em and leave 'em attitude is just one more reason to hate this kid. I've seen very few leading villains so lacking in any redeeming qualities. Possibly Lee Marvin in The Man Who Shot Liberty Valance is one.For those of us Yanks for who the film was retitled The Slasher for release by Lippert Pictures here, a Cosh is a kind of truncheon used to whack someone into unconsciousness or beat them severely. That's what he and his gang use. He's the bane of the existence of his poor mother Betty Ann Davies who agonizes over what she did wrong in raising him. She has a new man in her life, American Robert Ayres playing a Canadian, who thinks the kid just needed a good attitude adjustment that was never given him by a father who is not in the picture. In the end Kenney has to account for all his many sins.Besides a very young Joan Collins viewers should take note of the two Hermiones in the film, Hermione Baddely as the mother of Collins who wants to Cosh the Cosh Boy after she finds out what Kenney has done and Hermione Gingold playing a not disguised at all prostitute who is a friend of the Davies/Kenney family. It's a poor section of London these folks live in with evidence all around of the recent war. Kenney's gang hides out in the bombed out buildings still not repaired by 1953. Cosh Boy is still quite a riveting piece of film making and Kenney is unforgettably evil.

This movie made when Western civilisation was going to be torn down by the outbreak of Juvenile Delinquents, and the pimply youth were building forces in the US as well, so follow Cosh Boy with "When Youth Runs Wild" (1945). The US film is not as funny as the UK one but still has all the traditional delinquent-syndrome markers.Cosh Boy is a real hoot, especially the strange pitch of their voices or, perhaps this is the what delinquency does to the vocal cords. Making their coshes in trade classes at school was a goody, what or where was the teacher while these illegal instruments were being turned out. Suppose the old prostitutes were lucky that the boys weren't doing metal work at school or they would have been done over with knuckle dusters. Loved the 50/50 split: ten bob for you and fifteen bob for me, and the cosh wielding drongo didn't notice the shortchange.Loved the fashion. The best was the bloke in the two-toned car coat with tied waist topped off with a Homberg hat. Sooo hip.

Couldn't agree more with the previous review. I caught the last 15 minutes on cable. I have yet to see more wooden acting -- just standing there and saying the lines!If I had been the Cosh Boy I would have just slugged my stepfather on the jaw and run away. Or, if American, shot him with my handy revolver.