How to accuse someone of lying


うそだ isn't really a serious accusation. How would you say 'you're lying' more
seriously?




The answer @Unknown gave is perfect if you want more weight and directness to
the accusation

> Hmm.... 「うそつけっ！」, maybe? or 「うそつき！」とか・・ – Unknown May 21 at 22:04

