Crude
Vulgar, Vulgarity
noun, な adjective
Things that are below normal products are the cheap knockoffs and bad quality items. These items are incredibly crude and vulgar in their manufacturing and design. So much vulgarity!
You haven't seen this reading for 下 yet (sorry there's so many for this kanji!) so here's a mnemonic to help you:
Those items are so crude that you can't even tell what they're supposed to be. Honestly they all just look like statues of lumpy geckos (げ). That says it's a lamp but it looks more like a gecko looking at the sky. That chair? Definitely a bunch of geckos having a pool party. Are you sure you didn't get this stuff from a weird gecko artist?
このアニメは少し下品です。
This anime is a bit crude.
下品な声がすると思ったら、お前かよ！
I thought I heard a vulgar voice, and it turns out it's you!
あの芸人のネタは下品だから好きじゃないんだよね。
I don't like that comedian's routine because it's vulgar.