Open your mouth. A tiger fell in there on some spikes! That's what you tell everybody, but when they look in your mouth there's nothing there. It's all a big lie!
Lie about spikes in your mouth and I'll put soap with spikes in it in your mouth to teach you a lesson. That's why I'm using uni soap (うそ).
Currently there are no similar looking kanji which exist in the WaniKani learning system