Writer’s Corner With Mica gets obsessive:
- “His austere features are striking on a ship that is brim-full of young, good-looking people.”
“brimming with” is fine. “full to the brim with” would flow better here. “brim-full” is a) spelled “brimful”, b) archaic, and c) sounds straight-up bizarre in that context.

I was so sure I was right that I went and made google fucking graph it to confirm my instinctual feelings. I still, stylistically, prefer “full to the brim with” despite unpopularity, but google does bear out my suspicion that “brimming” is the most common modern usage, “brimful” sounds oddly old, and “brim-full” has barely been used at all since the 18th century.

