Define mailed it in a box

A clever phrase!

"Mailed it in a box" is a humorous way to describe something that has been sent or delivered in a package, often with a sense of laziness or lack of effort. It's as if someone has simply thrown the item into a box and sent it off without putting much thought or care into the process.

In a broader sense, "mailed it in a box" can also imply a lack of enthusiasm, creativity, or attention to detail in one's work or endeavors. It's like they're just going through the motions, without putting in the extra effort to make it special or noteworthy.

For example, if someone asks you to design a logo for their new business, but you just slap together a quick design and send it off without much thought, you might be said to have "mailed it in a box."