be like red rag to a bull(BrE: действовать на кого-либо как ...(AmE has: like waving a red flag in front of a bull): Just mentioning his ex-wife's name was like a red rag to a bull'More)
like waving a red flag in front of a bull(AmE: – BrE has: like a red rag to a bull: Visa and MasterCards approach to pricing has been like waving a red flag in front of a bull to retail businesses.'More)
thread(A leitmotif on journalism of melancholy marked all his writing (Merriam-Webster).: threads through this often-byzantine narrative. (Dictionary.com) A threadGeorgeK)
leitmotif(A leitmotif on journalism of melancholy marked all his writing (Merriam-Webster).: threads through this often-byzantine narrative. (Dictionary.com) A threadGeorgeK)
