Ethylphenidate, a drug very very closely related to the pharmaceutical Ritalin (methylphenidate). Amphetamine-like effects, but warmer and more MDMA-like. Legal and available off the internet.
Ki is a nickname for Kiley. Kiley as in the RIGHT way of spelling the name Kylie (sounding like Kah-I-Leigh). A person called Ki is cute, sweet, and all around an awesome person.
The sound an individual of Sri Lankan origin emits when poked. In particular social settings that are understood only by select scholars of Sri Lankan linguistics and culture, the individual may emit, Smi as a substitute. Know that Smi is both the antonym of; and only polite response to, ki.
You: Excuse me, sir, are you from the nation of Sri Lanka, formerly Ceylon?
Lankan: Yes. How can I help -
You: *poke*
Lankan: Ki!
You: Smi!