pony up
To pay the amount of money that is owed or due for something. (Usually used to reference something that is excessively or unreasonably expensive.) If you want to stay at an exclusive resort, you'll have to pony up the cash. I had to pony up $500 just to apply for the visa, and it will be another $500 if I'm actually granted it.
pony up
Pay money that is owed or due, as in Come on, it's time you ponied up this month's rent. The allusion in this expression is unclear. [c. 1820]
pony up
v. Slang To pay some amount of money that is owed or due: I had to pony up $6 for a hot dog at the airport. The star was charging $100 for an autograph, but fans gladly ponied it up. You said you'd repay me last week, so pony up!
pony up
Pay the money. “Pony” has nothing to do with small equines—it comes from pone, the Latin word for “put” (so does the Spanish verb poner). Therefore, if you owe someone money, you'd better pony up.