A megazip is a measurment of weed. Where a regular zip is only 1 ounce, a megazip contain 116 ounces. One rule to megazips though is if you buy 3+ you have to smoke it all in one day.
Etan: yo man we should buy a zip today were out of don.
Slice Dog: Nah man fuck a zip, lets get a megazip.
Etan: Nah b, 3 megazips
Slice Dog: O SHIIIIIIIIIIIIIIIIIT we gun b bunnin til the world ends.
Etan: You mean til the day ends ;)