love "fondle slabs". I've been going with "slave phones"
I started it maybe a couple of years ago. Was aiming to give myself a verbal reminder of their skinner box nature every time I mentioned them while keeping a fig leaf veneer of comfortability so I didn't have to explain if someone else overheard. Maybe didn't go hard enough with it; about a year ago it came up that my partner had been taking the name at face value and didn't ascribe anything sinister to it.