Zombie Awareness Day also called Easter by Chirstians. A day memorializing the second documented zombie case in history, the first was a guy named Lazarus. An important historical event to note prior to the Zombie Apocalypse.
I'm sharpening up my swords on ZAD day, just in case.
by dustmans April 24, 2011
2 more definitions
synonym of awesome, pwnage, or kickawesome.
guy: dude, i just got a new psp!!!!!1!1!!1oneonetwelve
by not_you_but_me June 20, 2008
zombie apocalypes defense system
Tim do you have a ZADS????
by awesome-o9685 January 29, 2009