くだらない
くだらない · kudaranai · JLPT N2 · i-adj
worthless
🗑️ 下らない = 下 (below) + らない (not): so low it is not worth your time
Kudaranai comes from 下らない, literally 'does not descend to (that level)'. Anything beneath your attention is worthless, so it is stupid or good-for-nothing.