What is the definition of Mailman Fluid?

Ah, mailman fluid - the unsung hero of the postal world, who delivers more than just letters and packages, but also a whole lot of... well, 'unexpected' substances. It's like the postal service's secret weapon for spreading joy (or fear), depending on the recipient. Picture this: "After delivering the package of his life, John the mailman accidentally left a bag of mailman fluid in the mailbox, causing chaos across the city!" That's right, folks, it's not just about getting your mail; sometimes, you gotta deal with the aftermath of a postal worker's misadventure.