  We propose a setup which combines giant emitters (coupling to light at
multiple points separated by wavelength distances) with nonlinear quantum
optics and its correlated photons. In this setup, we reveal a mechanism for
multiphoton chiral emission: the propagation phase of the center of mass of two
strongly correlated photons (a doublon), and the phases encoded in the coupling
points of two giant emitters, can yield completely destructive interference in
one propagation direction while supporting emission in the other direction. The
degree of chirality can be tuned by the phases of the couplings. We show that
the proposed setup can provide directional quantum many-body resources, and can
be configured as a building block for a chiral quantum network with
``correlated flying qubits'', enabling distinct applications beyond linear
chiral setups. Our findings point toward a rich landscape of tailoring
multiphoton propagation and correlation properties by exploiting interference
effects of giant emitters coupling to nonlinear photonic baths.
