It is when excrement happens to be located around the genitalia. This can often be hard to remove but can be rather tasty when mixed with porridge oats or nut custard.
Gentleman: Oh dear, there seems to be a darkened substance around my genital region
Gangster: G, you gotz urslef a bad case of the excrementalia
Gentleman: Oh dear, What should one do to relieve himself of this predicament?
Gangsta: Manz, ur stuck for life unless you get some nut custard
Gentleman: What is this nut custard you speak of?
Gangsta: Itz tha answer to this padikamnt cuzzy bear.
Prices shown in USD.