Final answer:
The author uses the phrase 'you gotta give the flies points for style' to express admiration for the flies despite their gruesomeness.
Step-by-step explanation:
The author uses the phrase you gotta give the flies points for style to express admiration for the flies despite their gruesomeness. This phrase is a colloquial expression that emphasizes that even though the flies are unpleasant, they still deserve credit for their unique attributes.