Noun

1. fuck.

   Oh, f-word, I've lost the keys.

2. The word fuck or faggot.

   The dialogue was littered with f-words.

3. Any word beginning with f that is not normally taboo but is considered (often humorously) to be so in the given context.

   She has no luck with diets. Don't mention the f-word (by which I mean "fat").

See also

• f-bomb
• b-word
• c-word
• n-word
• s-word
• -word
• eff
• effing