A sea slug.
One who is habitually idle:
A humming or deep murmuring sound.
An idler or a loafer.
(Brit., Informal) A loafer; bum
One who spends a lot of time doing a particular recreational activity:
Find another word for sluggards. In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for sluggards, like: slugs, slouches, loafers, laggards, idlers, drones, wastrels, layabouts and bums.