The numbing of one's legs after a lengthy session on the toilet (the toilet seat rim is typical applying pressure to a certain area of the upper leg that can decrease the flow of blood to the legs, causing numbness). The person will typically lose their balance when standing up to either wipe themselves or pull their pants up.

When one is not able to hold in a shit and it spills out and down one's leg(s)

Shitlegs descibes a person of dubious nature who cannot be trusted and is generally of bad personality.

See Bollock Chops.

-noun
The unfortunate occurrence of a bowel movement that crests one or both leg openings of an infant or toddler's diaper, resulting in yellow, curdy staining of the child's leg(s) and clothing (and often furniture, parents, and household pets).

- also verb, adjective

See also shitback and shitbaby

Anyone who is lazy as shit and can't move one leg in front of the other for fear of over exertion. Kodak and Heidelberg workers suffer from this the most. If you have checked how lousy they are doing, you can see why.