(slang) a beginner or greenhorn who lacks experience in a particular field

(slang) short for 小白脸 xiǎo​bái​liǎn

(historical) the personal name of Duke Huan of 齐桓公 qí​huán​gōng, a famous ruler of the state of Qi during the Spring and Autumn period

(old slang) a fool or simpleton