Expletive

Our word today is eureka. It is a kind of word called an expletive. Expletives are quick, short outcries of pain, surprise, anger or joy. We hear them all the time.

No one entered more fully than Shakespeare into the character of this species of poetry, which admits of no expletive imagery, no merely ornamental line.

deprecating being taken for ſerious, or to be underſtood that he meaneth any thing by them; but only that he uſeth them as expletive phraſes ... to plump his ſpeech, and fill up ſentences.

If we don't take advantage of any [expletive] in any way, then it's our loss.