"Coke On" is a misspelling by a someone whom tried to spell "Come On". It has now been designated as the official motto for the exchange students travelling to Oxford in 2015.
Contrary to the popular verb form of the word (to have coke on tables), the noun implies no actual drug use. Coke on tables simply connotes a situation in which an epic party is worthy of said coke on tables.
Man, at this house party, there gone be coke on tables (however in my mind I have no intentions of drug use...).
The act of putting cocaine (usually a significant amount) into your partners anus, then having them fart causing the cocaine to go up into the air. As they fart, it should go into your nose, or wait until they fart into the air causing a dust cloud, then snort it like that.