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].
“The evil has eclipsed the good, and the scale, which before rested
solidly on the ground, now kicks the beam.” —
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894