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1.
An absurdly large amount of hard drive space.

Popularized by a Toshiba commercial featuring T-Pain in which T-Pain dispenses his questionable technical advice while flailing a sub sandwich around.
It's all about the mega-gigabytes, SON!!!
by ninjaweasel December 24, 2010
 
2.
A file-size measurement within a hexacore cluster, one must go around as to not terrorize the prossation of the cpu.
okay. now we gotta get around the megagigabytes, to where it won't, terrorize the prossation. okay?
megagigabytes, son!
by michael scott hertzberg December 06, 2012