writer's block
From Longman Dictionary of Contemporary EnglishRelated topics: Literaturewriter's blockˌwriter’s ˈblock noun [uncountable] ALthe problem that a writer sometimes has of not being able to think of new ideasExamples from the Corpuswriter's block• Fink, not surprisingly, gets writer's block and at some stage the film becomes his fevered imaginings.• Unfortunately he seems to have had writer's block for nine of them.• When in the grip of writer's block I might stand up and walk to the window and look out.