Slurry (noun) is very, very closely related to slip. Both are liquefied clay, or suspensions of clay particles in water. Slurry tends to be thicker and is used to join pieces of leather-hard clay together.
Several potters I know, including myself, also use slurry or slip instead of water while throwing.
Also Known As: slip may be used interchangeably with slurry by some people.
Examples: Whenever possible, the slurry used to join leather-hard pieces of clay together should be made from the same clay body as the pieces to be joined.