Top Definition
The stroking of a matter vigorously back and forth in your cerebrum with great intensity until conclusion.
Materbation without conclusion causes great pain and discomfort.
I was struggling with matterbation as to wether she really cared for me. As I reached "conclusion" I realized to my pleasure that she did.

by Steven Wylie August 04, 2006
an individual that jerks off in the washroom at work
Matt disappears daily for a good vigorous session of Matterbation
by dumbass1 June 01, 2015
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