A fork of Rural Dictionary
Announcing that you intend to do something but then pull out at the last minute much to the annoyance of everyone involved.
Person 1: Hey, would you like to move in with me? Person 2: Of course. Day before moving in- Person 2: Oh I can't move in, i'm a complete bastard. Person 1: 'Doing a Mace' I see, no more being alive for you! (Person 2 is beating to death with a hammer as Person 1 is very annoyed)
To pull out of a commitment at the latest possible opportunity, often to the severe detriment of other parties involved.
Person 1: "Dude, can I have a kidney?" Person 2: "Sure" On operating table: Person 2:"Lol jk, no kidney for you" Person 1: "You're Doing a Mace! Noooo"*Dies*