  We study the 2D and 3D Prandtl equations of degenerate hyperbolic type, and
establish without any structural assumption the Gevrey well-posedness with
Gevrey index $\leq 2$. Compared with the classical parabolic Prandtl equations,
the loss of the derivatives, caused by the hyperbolic feature coupled with the
degeneracy, can't be overcame by virtue of the classical cancellation mechanism
that developed for the parabolic counterpart. Inspired by the abstract
Cauchy-Kowalewski theorem and by virtue of the hyperbolic feature, we give in
this text a straightforward proof, basing on an elementary $L^2$ energy
estimate. In particular our argument does not involve the cancellation
mechanism used efficiently for the classical Prandtl equations.
