by Shake Zula May 10, 2005

by TheLoudestFan March 04, 2009

A term coined by Albert Ellis to describe the tendency to think that certain things "must" occur or "must" be done.
Other forms: musterbate, musterbated, musterbating
Other forms: musterbate, musterbated, musterbating
Janice was musterbating about getting an A in every course.
The only acceptable musterbation is to believe that one must not musterbate.
The only acceptable musterbation is to believe that one must not musterbate.
by TheLastPunslinger May 15, 2005

(verb) To think you "must" do something without any choice when in all reality you have the choice to do or not do it.
by Che39 October 04, 2011
