  Quark flavour conserving (QFC) fermionic squark decays, such as ~t_{1,2} -> t
neutralino_i, are usually assumed in squark search analyses. Here we study
quark flavour violating (QFV) bosonic squark decays, such as ~u_2 -> ~u_1
h^0/Z^0, where the mass eigenstates ~u_{1,2} are mixtures of scharm and stop
quarks. We show that the branching ratios of such QFV decays can be very large
due to sizable ~c_R - ~t_{R/L} and ~t_R - ~t_L mixing effects despite the very
strong constraints on the QFV parameters from B meson data. This can result in
remarkable QFV signatures with significant rates at LHC (14 TeV), such as pp ->
gluino gluino X -> t c bar{c} bar{c} h^0/Z^0 missing-E_T X and pp -> gluino
gluino X -> t t bar{c} bar{c} h^0/Z^0 missing-E_T X. The QFV bosonic squark
decays can play an important role in the squark and gluino searches at LHC (14
TeV).
