The squrl of a vector F dotted into the normal vector to a surface is defined as the squared of the limit of ratio of the contour integral of F dotted into an infinitesimal line element of that contour to the area enclosed by the contour as the area approaches zero. Note that the squrl does not define a vector.
Guy 1: Man, how do I do this physics problem?
Guy 2: Dude, just take the squrl of it.
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