It's a shame that COSH BOY (strangely re-titled THE SLASHER) is so extremely dated, holding back what's promised by the edgy image of British teen actor James Kenney as a street thug "teddy boy" (name of youth gangs in England)... because Kenney not only delivers his dialogue strongly, but listens just as intensely...
Too bad most of his words are aimed at his dotting mother, about to marry a man who can't wait to punish her oldest son... and she's more important than the fellow gang members, who sporadically hit the streets to "cosh" (violently mug) their victims...
On the peripheral is a romance with Joan Collins, injecting the kind of wispy hysterics to suit what's ultimately more a melodrama with crime genre elements than the sleek crime-noir it could/should have been instead...
Yet despite the flaws, director Lewis Gilbert, during the few scenes that matter involving the young gang working together before turning on each other, brings the viewer straight into the action... that is, when the distractions haven't taken over, in this case, almost entirely.
