  A robust mechanism was recently proposed in which thermal freeze-out of WIMPs
can provide a unified origin of dark matter and baryon abundances in our
universe. We point out that this WIMP-triggered baryogenesis mechanism can
exhibit a rich collider phenomenology and be tested at the current and
near-future experiments at LHC, even in the case where the WIMPs are completely
devoid of SM gauge and higgs portal interactions, as may be motivated by the
persistent null results of WIMP dark matter searches. We catalogue a rich array
of LHC signatures robustly present in such a scenario. In particular, the
simplest such implementation can already offer a very clean signal of a
TeV-scale resonance that decays to diphotons with a cross section that can
easily be within the reach of the current and near-future LHC runs in the
region of parameter space that leads to a successful baryogenesis. Other
characteristic signatures include the production of multi-bottom and/or
multi-top quarks, promptly or displaced. An even more exotic possibility is the
production of two separate sets of isolated emerging jets connected by a
charged track, which may require new dedicated studies. Finally, di-nucleon
decay can also provide a powerful probe of the mechanism.
