"Sucker for" is a colloquial expression used to describe someone who has a particular liking or weakness for something. There are several synonyms that can be used interchangeably with this phrase, including "addicted to," "fond of," "avid for," "a fan of," "crazy about," and "obsessed with." All of these phrases convey a sense of enthusiasm or obsession with a particular subject or activity. Whether it's a love of chocolate, a passion for sports, or a fascination with science fiction, these synonyms for "sucker for" demonstrate the depth of our attachment to the things we enjoy most.