>>719219313
I personally prefer the term hack n slash, but you have to speak in a way that most people will get what you mean.

Genre names can be confusing for new players. E.g. If Mork called them hack b slashes, what would he call God Hand then? Beat'em up? Then new players might confuse it with a 2d beat'em up.
This is why Metal Slug is currently known as a "run & gun" instead of a shoot'em up, to avoid ambiguity.