This is the unsightly excess fat that protrudes sideways at the meeting of the thigh and buttock. More commonly found on women due to their higher natural body fat.
Splidge flanks are usually caused by excess fat, though they can also be caused by ill-fitting trousers or jeans.
A unit of currency, typically the U.S. dollar, roughly comparable to the contemporary slangy use of "ducats." Often used when the amount of money in question is significant.
Tickets to that football game are pricey stuff...you'll be out at least six hundred and twelve point twelve Splidoons, buckaroo.