From Discworld MUD Wiki
An item available from the T-shop, for Ankh-Morpork 12 dollars (or the cultural equivalent, pending the shop location) that permit a line change in the description. Only one person may use a compact at a time which must remain in the inventory of the one using it, for example in a container. It weighs 2/9 lbs.
The compact looks like:
This is a small, battered compact. It has the usual small mirror inside, but instead of a powder tray, it has a dial beneath it with a number of settings.
Without a compact, people will see the line as one of:
He is a strapping young human lad. She is a strapping young human lass.
You can use colours for those who have 'options output usercolour=on'. For example:
set compact to She is full of colours such as %^BOLD%^%^GREEN%^bold green%^RESET%^, %^RED%^red%^RESET%^, %^BLUE%^blue%^RESET%^ with a %^B_BLUE%^blue background%^RESET%^.