enough, "gritty realism" is only perceptible to media and film critics and the term is hardly ever used by anyone else. In fact no-one but film and tv critics ever use the term.
"the gritty realism of this documentary is in stark contrast to his other work"
if you see or touch something really really cute like a puppy, and have the urge to hurt or kill it
you grit your teeth and say something like "ohhh it's just soo cute!"