乌龙 (wūlóng) literally means 'black dragon' and is most commonly associated with oolong tea. Beyond tea, 乌龙 can also mean 'own goal' in sports or a blunder or mix-up in colloquial usage. In tea contexts, it refers to the semi-oxidized tea variety.
乌龙是一种半发酵的茶叶。
Wūlóng shì yì zhǒng bàn fājiào de cháyè.
Oolong is a type of semi-fermented tea.
他踢足球时不小心踢进了乌龙球。
Tā tī zúqiú shí bù xiǎoxīn tī jìn le wūlóng qiú.
He accidentally scored an own goal while playing soccer.
这件事完全是个乌龙,大家误会了。
Zhè jiàn shì wánquán shì gè wūlóng, dàjiā wùhuì le.
This whole thing was a mix-up; everyone misunderstood.