What is highspeed stall ?
I'm sure that your question was tongue in cheek at the time.
However, for the discussion, at least two situations might be so described -
(a) a pitch up to an appropriate G-level can cause an accelerated stall. In effect, the wing sees a "heavier" aircraft due to the load factor and stalls at the higher speed. Handling characteristics may be considerably more interesting than for the normal certification stall.
(b) at very high pitch rates (as I recall from an RAeS report on the subject - in excess of something like 70 deg/sec) a quasi-stable upper surface vortex (a bit similar to the stall vortex on a delta) can see the stall angle pushed considerably higher than what we see for the normal certification stall. Generally not relevant to most fixed wing aircraft but, apparently, a problem in the rotary wing arena at times.