Without (I hope) being seen as pedantic the term 'high speed stall' is best used in conjunction with straight and level flight at high speed where mach effects have caused loss of lift/trim changes/buffet etc (as has been described above).
A stall at a speed above the normal 1g stall speed caused by manoeuvring is best described as an 'accelerated' stall. This can occur in any aircraft even if the aircraft cannot fly fast enough to experience mach effects.