Dropping everything to hit McDonalds up for some food. Usually best done in pairs.
1. Hey fat cunt, you up for a Maccas run?
2. Maccas hit anyone?
The act of leaving your couch and going to McDonalds to get some food. Usually done in pairs/or group during the night.
Robbo: Hey bro, I'm hungry. You up for a Maccas run?
Johnno: Aight bro, lets go