chew it finer
To put into simpler terms. The phrase likely originated with American cowboys. Can you chew it finer? I don't understand that convoluted explanation you just gave. I always make sure to chew it finer when I have to explain mathematical concepts to people not in the field.
the finer points of (something)
The more nuanced, specific, or complicated details or aspects of something. It's nice to be able to discuss the finer points of Victorian literature with someone who has studied the subject.
finer than frog hair
1. Very thin. "Finer than frog's hair" can also be used. I'm not a fan of fettucine—I like my pasta to be finer than frog hair.
2. Very good or excellent. Wow, that dress is finer than frog hair—you look gorgeous!