  We report the discovery of a thin stellar stream - which we name the Jet
stream - crossing the constellations of Hydra and Pyxis. The discovery was made
in data from the SLAMS survey, which comprises deep $g$ and $r$ imaging for a
$650$ square degree region above the Galactic disc performed by the CTIO Blanco
+ DECam. SLAMS photometric catalogues will be made publicly available. The
stream is approximately 0.18 degrees wide and 10 degrees long, though it is
truncated by the survey footprint. Its colour-magnitude diagram is consistent
with an old, metal-poor stellar population at a heliocentric distance of
approximately 29 kpc. We corroborate this measurement by identifying a
spatially coincident overdensity of likely blue horizontal branch stars at the
same distance. There is no obvious candidate for a surviving stream progenitor.
