Ancient Australian Proverb - A Macca's run is a sacred late night ritual performed by all p-plate license holding kids in Australia. It's a trip to the local Maccas at a late hour with you, the deso driver, and one faithful mate to carry all the orders that only half your fucking useless friends have paid for and if you're the only fucker sober at the party it's your arse asking for 40 fucking oreo McFlurry's at 2 AM.

the thing that you don’t have when you’re phones percentage is over 20

Dropping everything to hit McDonalds up for some food. Usually best done in pairs.

The act of leaving your couch and going to McDonalds to get some food. Usually done in pairs/or group during the night.