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1.
To be extremely critical of, and concerned with the quality of worksmanship. Usually used in reference to someone in a position of management.
I modified a feature without filing a change request and Scott got all westfall on me for the next couple days.
by RH81 June 06, 2006
 
2.
A burly car salesman or school teacher whose soul purpose in life is to shoot flames for the enjoyment of children and shawties alike
Children: Shoot flames Westfall!
by YouDon'tWannaKnow May 05, 2009