Meaning

• A profane, vulgar term, notably a curse or obscene oath.

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

• A word without meaning added to fill a syntactic position.

• A word that adds to the strength of a phrase without affecting its meaning.

Meaning

• Serving to fill up, merely for effect, otherwise redundant.

• Marked by expletives (phrase-fillers).