Was making a translation (not bl related) and came upon this definition for "trade". I did not know that. But i do know a lot of examples. And i bet you guys do too. I've found the name for them, in the middle of my job... Did everyone else knew about
![Marty McFly [Back to the Future]](https://allpornimages.com/nude/marty-mcfly-back-to-the-future-v0pcXLJiZB/marty-mcfly-back-to-the-future-thumb.webp)
