Sit

The #sit extended command makes your character to sit down; this can have different effects (and messages) depending on what you're sitting on.

Sitting on a trap while you're trapped in it abuses wisdom, and for some traps, makes you stuck in it longer. Sitting in a pool will rust your armor. Probably the most used feature is sitting on a throne. Sitting on an altar lowers your luck.

You can also lay eggs that are guaranteed to hatch into baby versions of your polymorphed self by sitting, if you are a female oviparous monster and there are no other objects on the square you are on.

Tactics

If you need an emergency escape method and want to use a teleportation trap or a trap door to do so, and if you managed to escape it when you entered the square, you can just #sit to activate the trap.

Currently there is a bug associated with this. For example, a gnome dies in a pit and you want to loot the gnome, but you escape when you try to enter the pit. Trying to #sit gives you a message about the gnome corpse being uncomfortable to sit on and you won't fall in the pit.

You can repeatedly #sit on a magic trap to boost your charisma.