Definitions
1.AdjectiveServing to fill up, merely for effect, otherwise redundant.
2.AdjectiveMarked by expletives (phrase-fillers).
3.NounA 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."
4.NounA word without meaning added to fill a syntactic position.
5.NounA word that adds to the strength of a phrase without affecting its meaning (such as fuckin in "there's no fuckin way he's gonna get away with it").
6.NounAn obscene or otherwise offensive interjection (such as shit, fuck, or damn it).