Noun that refers to an imposing amount of mass. Can be used to comment on someone's intimidating or weak physic. Most commonly used for motivational purposes to boost a bros confidence before or after a GTL (gym, tan, laundry) session.
Yo Peter has been hitting the gym hard lately, check out his massiveness.

Yo bro, where's your massiveness?

C'mon man, don't just sit there. You're going to lose all your massiveness.
by GTL-P May 02, 2011

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