noun, humorous, often
a “small black room” where one is confined (in order to reflect on their wrongdoing, etc.)
noun, slang
the room for secondary inspection at a port of entry
許先生説，他解釋半天，表示他們只是來旅遊，最後海關放行他們兩人，但是第三人黃小姐卻被問了幾個問題後直接帶進“小黑屋”
许先生说，他解释半天，表示他们只是来旅游，最后海关放行他们两人，但是第三人黄小姐却被问了几个问题后直接带进“小黑屋”
xǔ xiān shēng shuō ， tā jiě shì bàn tiān ， biǎo shì tā men zhǐ shì lái lǚ yóu ， zuì hòu hǎi guān fàng xíng tā men liǎng rén ， dàn shì dì sān rén huáng xiǎo jiě què bèi wèn le jǐ ge wèn tí hòu zhí jiē dài jìn “ xiǎo hēi wū ” Mr. Xu said that he explained [to the CBP officer] for a long time that they were only here for tourism, and the customs finally let two of them go, but the third person, Ms. Huang, was brought directly into the "little black house" after being asked a few questions."
noun, slang
(American (1980–), slang) a real-estate property that is overpriced, aging and in bad condition
親歷硅谷終極“搶房戰”：瘋狂加價30萬還排不上，“小黑屋”被炒成天價
亲历硅谷终极“抢房战”：疯狂加价30万还排不上，“小黑屋”被炒成天价
qīn lì guī gǔ zhōng jí “ qiǎng fáng zhàn ” ： fēng kuáng jiā jià ３０ wàn hái pái bù shàng ， “ xiǎo hēi wū ” bèi chǎo chéng tiān jià Experience the ultimate "price war on houses" in Silicon Valley of my own: a crazy increase of $300,000 was even not up to the list, and the prices of "little black houses" were speculated to be sky-high.
Examples (Wiktionary)
Mandarin
许先生说，他解释半天，表示他们只是来旅游，最后海关放行他们两人，但是第三人黄小姐却被问了几个问题后直接带进“小黑屋”
許先生説，他解釋半天，表示他們只是來旅遊，最後海關放行他們兩人，但是第三人黃小姐卻被問了幾個問題後直接帶進“小黑屋”
xǔ xiān shēng shuō ， tā jiě shì bàn tiān ， biǎo shì tā men zhǐ shì lái lǚ yóu ， zuì hòu hǎi guān fàng xíng tā men liǎng rén ， dàn shì dì sān rén huáng xiǎo jiě què bèi wèn le jǐ ge wèn tí hòu zhí jiē dài jìn “ xiǎo hēi wū ”
Mr. Xu said that he explained [to the CBP officer] for a long time that they were only here for tourism, and the customs finally let two of them go, but the third person, Ms. Huang, was brought directly into the "little black house" after being asked a few questions."
Experience the ultimate "price war on houses" in Silicon Valley of my own: a crazy increase of $300,000 was even not up to the list, and the prices of "little black houses" were speculated to be sky-high.