  We construct novel RG flows of D=11 supergravity that asymptotically approach
$AdS_4\times S^7$ in the UV with deformations that break spatial translations
in the dual field theory. In the IR the solutions return to exactly the same
$AdS_4\times S^7$ vacuum, with a renormalisation of relative length scales, and
hence we refer to the flows as `boomerang RG flows'. For sufficiently large
deformations, on the way to the IR the solutions also approach two distinct
intermediate scaling regimes, each with hyperscaling violation. The first
regime is Lorentz invariant with dynamical exponent $z=1$ while the second has
$z=5/2$. Neither of the two intermediate scaling regimes are associated with
exact hyperscaling violation solutions of $D=11$ supergravity. The RG flow
solutions are constructed using the four dimensional $N=2$ STU gauged
supergravity theory with vanishing gauge fields, but non-vanishing scalar and
pseudoscalar fields. In the ABJM dual field theory the flows are driven by
spatially modulated deformation parameters for scalar and fermion bilinear
operators.
