  We present a novel mechanism of using solar neutrinos to speed up dark
matter, inspired by the fact that neutrinos are the most energetic particles
from the Sun with a well-understood spectrum. In a neutrino portal dark sector
model, we show that dark matter with sub-GeV mass could be accelerated by the
$pp$ neutrinos to velocities well above $10^{-3}c$ and capable of depositing
large enough energy at direct detection experiments. A crucial ingredient of
this mechanism is the dissociation of stable dark matter bound states that
exist in Nature. The resulting dark matter velocity distribution bears a strong
resemblance in shape to the solar neutrino spectrum. As an application, we
derive a leading limit on light dark matter interaction by reinterpreting a
recent PICO experiment result.
