Top Definition
Playing with your brain. Taking large amounts of fun information and just sticking it in there.
Online friend: What are you doing?

Me: Masturbraining hard. The banana as we know it today was first grown in 1836; earlier bananas were tougher and starchier (essentially plaintains)

Online friend: ...
#learning #smart #reading #brainor #book-learning
by MsLolibear June 01, 2011
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