definition 1: (noun) A maximum cycle of getting drunk, hungover, drinking again, and so on.
definition 2: (noun) A day in which you are drunk the maximize number of hours possible.
definition 3: (noun) A day in which you get drunk in the morning, hungover by noon, sleep it off by the afternoon, drunk again around dinner time, sleep that hangover off by midnight and start drinking again.
Dude1: Man, I pulled a maxcy yesterday!
Dude 2: wasn't yesterday Tuesday? Didn't you have to work?