Ask HN: What's your best unused domain?

In the category of moderately obscene gag domains:

I am not sure if internet.femboy.exchange already expired, but it was going to be a pissnet IRC server before pissnet collapsed, right next to together.we.can.yiff.mom.

micropenis-labs.com - I sent a few care packages to my buddy who’d moved out of state, using joke “corporate lab results” invoices taped to it (guess what the diagnosis was). I printed out logo stickers for the box, and to really ensure an exquisite user experience the URL had to point *somewhere*. Fun weekend project.

At the end of the day, it was more for his new apartment complex neighbors, and I hope somebody had a chuckle :)