  We study a scenario of electroweak symmetry breaking where the weak gauge
boson masses arises significantly from a fermiophobic source. To minimize
flavor violation, the fermion mass generation is still due to one light doublet
scalar. One of the realizations is the Bosonic Technicolor model. In these
scenarios, the Yukawa couplings between the light scalar and the standard model
fermions are in general enhanced while the couplings between the light scalar
and weak gauge bosons are reduced. Even though the flavor violation induced by
the neutral scalar at the tree level can be avoided, the charged scalar state
inevitably mediate flavor changing neutral current processes. With the
enhancement in the Yukawa couplings, one expects serious constraints of such
models from flavor violating effects. We find that the most severe bound comes
from neutral meson mixing of $B^{0}_{d}-\bar{B^{0}_{d}}$. Large parameter space
is excluded if the weak gauge boson mass generation is dominated by the
fermophobic sector. However, the correlation between the Yukawa coupling and
charged scalar mass show that a factor of two enhancement in top Yukawa
coupling is still allowed for charged scalar heavier than 500 GeV. We use this
as a benchmark point to study the phenomenology of the light scalar. It is
interesting that the destructive interference between the top quark loop and
the $W$-boson loop in the di-photon channel becomes significant and makes the
channel negligible. In the light scalar region, the search becomes much more
challenging than the conventional SM Higgs boson.
