Like, any such case should be settled by pointing to literally any dictionary entry for said word or phrase, or any pre-existing iteration of the same in any other work.
Case dismissed; not a unique creation.
Take the MyPillow whackadoodle. If he tried to trademark "My Pillow", get fucked. Remove the space, though? MyPillow? Sure, that's unique. But you don't get to sue anyone just for using the word "pillow".