Noun
(uncountable) A numerical notation used to describe juggling patterns, where each number represents the height and direction of a throw.
(countable) A specific notation for a pattern.
Source: en.wiktionary.orgOther extensions to siteswap have been developed, including passing siteswap, Multi-Hand Notation (MHN), and General Siteswap (GS). Source: Internet
There is also multiplex siteswap for patterns where one hand holds or throws two or more balls on the same beat. Source: Internet
Those examples are for two hands making alternating or "asynchronous" throws, and often called vanilla siteswap. Source: Internet