A landslide came out of your mouth and created your lips. Before the landslide, you just had a wide open mouth hole.
Now you can use your new lips to enjoy a nice, cold Kuchi beer (くちびる). The Kuchi people are Afghan Pashtun nomads. They are lesser known for their amazing beer. And you've never been able to get this delicious beer into your mouth, but now that you have lips you can get it all in there.
Currently there are no similar looking kanji which exist in the WaniKani learning system