From Longman Dictionary of Contemporary Englishbe a sucker for somebody/somethingbe a sucker for somebody/somethinginformalLIKE somebody OR something to like someone or something very much, especially so that you cannot refuse them I’m a total sucker for seafood. → sucker
Examples from the Corpus
be a sucker for somebody/something• He ordered catalogues from Philadelphia and was a sucker for any newly imported plants.• I enjoy movies but am a sucker for sad endings.• But he was a sucker for that gleam in her eye.• The hunter is a sucker for the hunted.• Anyway, the scientists found that the mice were suckers for poisoned tuna.• She was a sucker for his charm.• It all stunned Jack, who was a sucker for slick talk, and he bought me drinks for an hour. 