Turn The Screw Meaning

(idiomatic) To increase the pressure of a situation

Example: 2012 September 15, Amy Lawrence, “Arsenal's Gervinho enjoys the joy of six against lowly Southampton”[1], the Guardian:
  Arsenal's dominance was reflected in a flurry of goals before half-time – three in six minutes: first, Podolski turned the screw with a peach of a free-kick; then Gervinho accelerated on to Mikel Arteta's beautifully crafted pass and beat Davis at his near post with conviction; and finally Southampton's defence unspooled completely when Gervinho broke to release Gibbs, whose return ball cannoned off Nathaniel Clyne for Southampton's second own goal of a sobering afternoon.