Having thick lips, as a negro; labroid, as a fish; thickened around the edges, as an ulcer.
The Century Dictionary (Public Domain)
Use "thick-lipped" in a sentence
""No fear," answered their spokesman, one Koogoo, a strapping, thick-lipped Ethiopian-looking man."
"Here was the fighter -- the beast with a streak for a forehead, with beady eyes under lowering and bushy brows, flat-nosed, thick-lipped, sullen-mouthed."
"All those fawning stories, all those bloody headlines, all those wire-service photos of the thick-lipped, jowly, 235-pound Snorky dolled up in outfits that made him look, as a New York reporter once wrote, “like an overstuffed capon”—all of this was very bad for the drys."