cross as two sticks

Adjective

not-comparable

(simile) Particularly ill-natured and disagreeable.

Japanese Meaning

非常に不機嫌で意地悪な様子、扱いにくい／嫌な性格であること

Don't wake him when he's cross as two sticks, or he'll snap at everyone around him.

彼がひどく不機嫌で気難しいときは起こさないでください。さもなければ周りの人に当たり散らすでしょう。

Sense（1）

(simile) Particularly ill-natured and disagreeable.