turn up the heat 1. to make a situation more serious by trying harder to force someone to do something. Lorry drivers are discussing whether to turn up the heat on their bosses by holding a one-day strike. (often + on) The United States has turned up the heat by threatening military action. 2. to start to work or play in a more determined and effective way. Nottingham turned up the heat in the second half and forced their opponents back onto the defensive. |