In spoken English, you'll sometimes hear sentences like the following: I had a great day at the office today... not. This use of "not" is most common among children/adolescents, I think (it might be on the way out even among these groups), but adults will occasionally use "not" in this way as well. More recently, I've heard people use complete sentences negating what they've just said, pronounced with an exaggerated falling intonation: My cousin took a trip to Antarctica last year. (He didn't.) I've started running 40 miles a day. (I haven't.) The higher tone is generally on the pronoun (he, I, etc.), and the low tone on the negated verb. In your language, if someone made a sarcastic statement like the above (I had a great day at the office...), do you have a short expression like "Not!" that can be used to clarify / emphasize that it's sarcasm?