Any engagement, where both parties involved will benefit from the outcome.
Operating a small scale, sustainable micro green farm is a positive sum game. Everybody wins, the customer, the farmer, the planet
Offered a math teacher oral pleasure in exchange for a high grade in a class.
Mick: How did he get an A in calculus?
Tone: He did the sums right
To give or receive an excess of something. Originally bullets as in git more shot. But later as in get more drugs
A random amount of cum, semen, etc.
Extremely Hot Female Cashier: "Alright, this will equal to 5 dollars and 53 cents"
Me: "What if I gave you a cum sum that you'll want to pay that much for?"
"Hell ya baby!"
A mildly racist term commonly used in kitchens by the head chef when no one owns up to a mistake. It is meant to sound like "some cunt" but as a name, to put emphasis on the fact whoever isn't owning up is a cunt.
"Who broke this plate?"
*No one owns up*
"Ok then, guess the Asian fella Sum Kun did it.