| 随便 | suí biàn | as one wishes / as one pleases / at random / negligent / casual / wanton |   |
| 大大咧咧 | dà dà liē liē | carefree / offhand / casual | |
| 马马虎虎 | mǎ ma hū hū | careless / casual / vague / not so bad / so-so / tolerable / fair | |
| 倜傥 | tì tǎng | elegant / casual / free and easy | |
| 大剌剌 | dà là là | pompous / with a swagger / casual | |
| 随性 | suí xìng | casual / laid-back / doing as one pleases | |
| 大大咧咧 | dà dà - liē liē | (idiom) carefree / offhand / casual | |
| 打工 | dǎ gōng | to work a temporary or casual job / (of students) to have a job outside of class time, or during vacation | |
| 闲聊 | xián liáo | to chat / casual conversation | |
| 替补 | tì bǔ | to replace (a damaged component with a new one, an injured player with a substitute player, full-time workers with casual workers etc) / a substitute / a replacement | |
| 闲话 | xián huà | casual conversation / chat / gossip / to talk about (whatever comes to mind) | |
| 便装 | biàn zhuāng | casual dress | |
| 休闲裤 | xiū xián kù | casual pants | |
| 帮工 | bāng gōng | to help with farm work / casual laborer | |
| 不苟 | bù gǒu | not lax / not casual / careful / conscientious | |
| 一面之交 | yī miàn zhī jiāo | to have met once / casual acquaintance | |
| 一日之雅 | yī rì zhī yǎ | lit. friends for a day (idiom) / fig. casual acquaintance | |
| 偶犯 | ǒu fàn | casual offender / casual offense | |
| 唾余 | tuò yú | crumbs from the table of one's master / castoffs / bits of rubbish / idle talk / casual remarks | |
| 大不列蹀 | dà bu lie die | to be too casual or informal | |
| 打短儿 | dǎ duǎn r | casual labor / to work for a bit | |
| 疏不见亲 | shū bù jiàn qīn | lit. casual aquaintances should not come between relatives / blood is thicker than water (idiom) | |
| 临时工作 | lín shí gōng zuò | casual labour | |
| 偶尔吸毒 | ǒu ěr xī dú | casual use | |
| 言者无意，听者有心 | yán zhě wú yì , tīng zhě yǒu xīn | to take a casual remark to heart (idiom) | |
| 床友 | chuáng yǒu | (slang) friend with benefits / casual sex partner | |
| 露水姻缘 | lù shuǐ yīn yuán | casual romance / short-lived relationship | |
| 次正装 | cì zhèng zhuāng | smart casual attire | |
| 约吗 | yuē ma | (neologism c. 2014) (slang) Are you interested? (originally an invitation for casual sex, later generalized as a playful or humorous invitation for any activity) | |
