| 偷偷摸摸 | tōu tōu mō mō | (idiom) surreptitious; sneaky |
| 鬼鬼祟祟 | guǐ guǐ suì suì | (idiom) sneaky; secretive; furtive |
| 鬼祟 | guǐ suì | evil spirit / sneaky / secretive |
| 鬼头鬼脑 | guǐ tóu guǐ nǎo | sneaky / furtive |
| 偷摸 | tōu mō | surreptitious; sneaky |
| 玩阴的 | wán yīn de | (coll.) to play dirty; to use underhanded tactics / (coll.) sneaky; underhanded |