Vomit

Vomit was one of a variety of bodily fluids that could be squeezed out of the rocks of Nebulax 4. (TV: The Bounty Hunter) Vomiting was one of several conditions affecting young Killorans around their fourth year. (PROSE: Mentioning the War)

Humans could also eject vomit from their systems whenever they felt ill. As an added bonus to his infospike, in 200,000, Adam Mitchell had a Vomit-O-Matic implanted into him, which froze his vomit. (TV: The Long Game)