The act of being a wing man for some one performing the McChester.(When you go to a bar get wasted and run around naked outside while eating as much mexican food as possible so you have constant diaraherra all over the streets. After that you shove a winchester rifle up your ass until you finally pass out.) The Macchester is also eating as much mexican food as possible but is also shitting on the mcchester's face and or chest. usually the macchester is the designated driver.
Tyrone: yo mc adamsss
McAdams: wut chu want?
Tyrone: did chu hear bout that crazy negro doin the Mcchester with his MacChester??