In 1 ABY Sleemos kidnapped a CorSec agent working for Captain Durgur Pyne. Pyne knew that they knew most of his people and would kill the kidnapped agent if they saw one of them approaching. So he decided to ask a spacer that had recently helped him arrest a pirate to rescue his agent. The spacer attacked the Sleemos and managed to free the CorSec agent.
Whether the naming of their group was intentional or not, their name meant "slimeballs" in Huttese.
- Star Wars Galaxies: An Empire Divided