From Longman Dictionary of Contemporary Englishfork something ↔ over phrasal verb especially American English informalto give money to someone or something, or spend money on something The arena won’t be finished until private donors fork over more money. → fork→ See Verb table
Examples from the Corpus
fork over• Spoon the mince mixture into the greased baking dish and roughly level the top with a fork.• Mash the cheese with a fork and grate over it the rind of an orange.• With a fork draw lines over the warm chocolate to resemble bark.From Longman Business Dictionaryfork over something phrasal verb [transitive] informal American English another name for fork outCongress will simply continue to fork over subsidies to special interests. → fork→ See Verb table 