Black ooze

is a liquid that can only be found inside, and causes stiff legs or sore throats if consumed. The player character will more often than not be consuming forcefully due to other creatures. It will never be a component liquid required for a cure. It can be wished for by wishing.

Forcefully drinking Black Ooze
will attempt to make the player character prone by tripping them when they appear. will also spew any liquid, including, to force the player character prone. If the agility save fails and the player character becomes prone in a puddle of, some will get into their mouth:

The player character must make a toughness save of difficulty 13. If this fails, the player character will be inflicted with either ironshank onset or glotrot onset. The disease type is decided by the Z-level, or elevation, of where the disease was caught, so the same zone will only apply one disease. The surface is a Z-level of 0. If on an even Z-level, ironshank will be applied. If on an odd Z-level, glotrot will be applied instead. Because of this, catching a disease in the Cloaca of will always result in Glotrot (due to a Z-level of 5).

also can grant a disease on a melee hit, but whether or not the enters the mouth this way is not specified.

Sources of Black Ooze

 * Pools of can be found on the floor in
 * will explode into a 3x3 square of on death
 * Can be sold by, one of which will always spawn in the.
 * The is guaranteed to have one dram of  for sale.

Uses of Black Ooze

 * One dram is a component of the Cloaca Surprise

Consuming Black Ooze
Drinking it will result in the message "It's repulsive!" and inflict the imbiber with glotrot onset (for odd Z-levels) or ironshank onset (for even Z-levels) with no save. It does not satiate hunger or quench thirst.

is described as adding self-diseasing based effects to cooking. Cooking with has only one possible effect: it will apply a sore throat regardless of Z-level and with no save.