Slug: A raw piece of metal (CPO select). When put through Intense heat and pressure (initiation) is then forged into an object of incredible use/value (The Chief).
Selectee learning under guidance
A Slug is the slang term used by current CPO's to refer to CPO selectees, who have not been through CPO initiation or indoctrination.
Slug=Limax
I assume you mean "A" sea slug. No, a sea slug is not a fish, but an echidnoderm.
If you mean PROTIST, then no.
Slug could be a snail like animal. It could also mean one heavy bullet.
A slug is a mollusk like a snail, if you mean a slug like from a shotgun about length of shell, slug can also be slang for bullets which can be literally any size up to max.
To move or act slowly - as a snail or slug does.
Swallow shot slug
rifle slug regular slug
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"Sluggish" means slow, or labored, or moving like a slug.
There are three common meanings for the word slug. One is a mollusk similar to a snail, but without a shell, the second is a type of bullet that is larger than buckshot, and the third is a big swallow, as in taking a 'slug' from a bottle of whiskey.