to flatter someone in an obsequious or sycophantic manner; to kiss ass

他这种尝粪奉承的小人，为了升职不择手段。

to taste a patient's excrement as a form of medical examination, historically regarded as an act of loyalty or filial piety

在二十四孝中，庾黔娄曾通过尝粪来判断父亲的病情。