1. most resembling soup in consistency; most liquid or watery
Usage: superlative form of soupy
2. most foggy or misty
Usage: informal; superlative form of soupy

Examples

• This is the soupiest stew I’ve ever made.
• The gravy turned out soupiest when I added too much broth.
• Of all the batches, this one came out the soupiest.
• The morning was the soupiest we’d seen all week.
• The soupiest fog rolled in just before dawn.
• Her painting technique created the soupiest watercolor effects.