1. The money that is left AFTER the bills are paid; Excess cash flow. Profits.
2. To be in possession of more money than expected. Extra paper.
1. Back in '03, I could barely pay the bills - let alone feed my kids! But ever since I started hustlin, I got all this leftover cake.
2. I pretty much burned my paycheck last night at the strip club, but when I woke up this morning I found some leftover cake in my piggy bank. Time for Round 2!
It all starts after you've jacked off: you have put your pants back on, and are minding your own buisness when you get this cold slimy sensation/tingling down your left leg. Then you realize that your dick has just coughed up another drop of cum, and its slowly crawling down your legs. You start to limp, trying to make sure it doesn't stain your pants, while acting normal. You can't do anything. Your stuck. You've just become a victim of a leftover koppel.
"oh dude i was jackin it between math and latin and i thought i was alljuiced out...but no, half way through latin i fell victim to a leftover KOPPEL."
A mythical ingredient called for in many recipes. The internet also boasts multiple ways to use up any of the so-called "Leftover Wine", similar to the way the internet has articles on training your unicorn.
"You can freezeleftover wine in ice-cube trays to be used in recipes at a later date" -The Internet