In Japanese, there isn't a direct equivalent to the English word "fuck," but various expressions capture similar emotions depending on the context. For frustration or as a general expletive, くそ (kuso), meaning "damn" or "shit," is commonly used. A stronger, more frustrated expression might be ふざけるな (fuzakeru na), meaning "Don’t mess with me" or "Are you kidding me?" In sexual contexts, the verb やる (yaru), meaning "to do," can be used as a slang term for sex, while the borrowed English word ファック (fakku) is sometimes used in informal or dramatic settings. Another strong but less explicit exclamation is ちくしょう (chikushou), meaning "damn it" or "son of a...". Japanese tends to favor subtler expressions over direct vulgarity, so context and tone play a significant role in choosing the right phrase.