Wiktionary
red worm
n. (context chiefly Southern US English) An earthworm.
WordNet
red worm
n. terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers [syn: earthworm, angleworm, fishworm, fishing worm, wiggler, nightwalker, nightcrawler, crawler, dew worm]