Just call em cargo pants with mag shaped pockets.
Well we would have to call them cargo pants with mag shaped pockets, slash pockets, knee pad holder, and with holster retention strap. Not only that but most of the "tactical" style pants are made with heavier materials.
I swear this anti-mall ninja stuff is almost as bad as PC stuff I have to deal with in the real world. People call them tactical when you are looking for pants of a particular style, tactical pants are of a certain style, compared to say concealed carry pants, dress pants, or other options.
I call then pants and shorts, but I love then since I can easily put my starter/spare magazine for competitions and such in the mag pockets, and they are very durable.
Also since they are made for duty use I can choose between a lighter pants and heavier, while still keep that durability great for those of us in warmer climates, where we rarely need heavy pants.
Then again I mostly only use tactical pants for range wear. And I only call them tactical pants when I am order them.