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How do I say "You are lying!" in a joking way?

Can I say:

嘘{うそ}だよ

or is there a friendlier way to say it?

Charlie Brown
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3 Answers3

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Another is:

うそつけ (嘘{うそ}吐{つ}け)！ - Liar! Comes from 嘘｛うそ｝をつく, to lie

From comments:

うそつき (嘘{うそ}吐{つ}き) - Liar; Someone who lies

Chocolate
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ishikun
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    You also have 嘘吐き. – 永劫回帰 Nov 04 '16 at 22:30
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    うそつけ！ would be fine to use jokingly among close friends, but うそつき！ doesn't really sound friendly and may be too serious/harsh... – Chocolate Nov 05 '16 at 00:02
  • Just a minor comment, but 吐｛つ｝く is not normally used; hiragana is the common writing for it. People will be able to read it though – a20 Jan 17 '18 at 08:50
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嘘だよ is likely to mean "I am joking." One way to say "you are lying" is to use an interrogative form:

嘘だろ！？ / 冗談だろ！？

Isn't that a joke?

マジかよ！？

Really!?

Examples above are very casual. Of course we can make them formal by using 敬語:

嘘ですよね？ / 冗談ですよね？

本当ですか？

(note that マジ is a casual saying of 本当).

If we use a normal sentence, it might sound in a strong tone, so not friendly:

嘘だ。 / 嘘だろ。

It's a lie. 　 (it may sound like "It's definitely a lie.")

Community
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Faily Feely
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-1

Perhaps a little more indirect:

違{ちが}います！

Often translated as “it’s different”, it’s also used for “just kidding” or “that’s incorrect”.

In Japanese culture, people rarely confront each other or directly disagree. Most of the time, they will correct a misunderstanding rather than disagree.

Tom Kelly
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    I would argue that 違います is closer to "You're mistaken," which is inherently different from "You're lying." – ajsmart Jul 05 '18 at 20:05