Top Definition
When a woman (or man if in a homosexual relationship) belligerently, begrudgingly and/or reluctantly gives into her man’s desires, pleas and/or requests for a blow job.
I was so exhausted last night, but he was in the mood, so I mustard-up all my energy for a grump job. At least he was happy.
by #1 Howard Stern Fan August 09, 2010

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