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1. musterbate
To sit idly and think.
"That is a lot of money. I will have to musterbate for a while before I make a descision."
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2. Musterbate
(verb) To think you "must" do something without any choice when in all reality you have the choice to do or not do it.
"I musterbate about having to go to work to be able to pay my light bill."
3. musterbate
(v.) To stimulate oneself or one's partner to the point of ejaculation of mustard.
Oh prease, it's time I musterbate in the bathroom, with the lotion