  The phenomenological implications of supersymmetric theories with low scale
supersymmetry breaking and a squark as the lightest standard model superpartner
are investigated. Such squarks hadronize with light quarks, forming sbaryons
and mesinos before decaying. Production of these supersymmetric bound states at
a high energy collider can lead to displaced jets with large negative impact
parameter. Neutral mesino - antimesino oscillations are not forbidden by any
symmetry and can occur at observable rates with distinctive signatures. Stop
mesino - antimesino oscillations would give a sensitive probe of up-type
sflavor violation in the squark sector, and can provide a discovery channel for
supersymmetry through events with a same-sign top-top topology.
