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1.
the act of havinq hard core sex
Someones qonna be visitinq MackCity tonight
by Mack City dudeee April 06, 2011
 
2.
The act of macking on with multiple people on one occasion. Often the city of mack is visited during a "mack competition" where participants compete and the winner is decided based upon who has macked on with the most people in the given period, for example during a night out clubbing. A rendition of Rack City - Tyga is often sang whilst in mack city, replacing the word "rack" with "mack".
"I am getting a one way ticket to mack city tonight! Get ready boys!"

"Mack city bitch, mack mack city bitch"
by mackcitybitch November 21, 2013