From Longman Dictionary of Contemporary Englishpony up (something) phrasal verb American English informalto find or produce a particular amount of money All investors had to pony up a minimum of $5000. → pony→ See Verb tableFrom Longman Business Dictionarypony something up phrasal verb [intransitive, transitive] American English informal to pay a sum of moneyVoters were in no mood to pony more taxes up. → pony→ See Verb table