E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Kick the Beam (To).
To be of light weight; to be of inferior consequence. When one pan of a pair of scales is lighter than the other, it flies upwards and is said to kick the beam [of the scales].
1
The evil has eclipsed the good, and the scale, which before rested solidly on the ground, now kicks the beam.Gladstone.