Slug
/slʌɡ/noun
A slow-moving land mollusk, or a heavy blow/projectile in informal use.
Did you know?English slug is probably related to the same ancient Germanic root behind words for “slack” and “sluggish,” which is why it carries that heavy, dragging energy.
Etymological Timeline
Proto-Germanic
PGmc
*slugaz
“slow, slack, limp”
Old English
OE
slugu
“a slug, a slow creeping creature”
Middle English
ME
slugge
“a slug or sluggard; something slow or heavy”
16th Century
English
slug
“a slug; later also a heavy blow or a large bullet”
Modern English
English
slug
“a shell-less land mollusk; by extension, a heavy blow or projectile”