阿谀苟合

Explanation: A: catering, music from; flattery: Quyifengying; Gou: struggling; sexual immorality: unprincipled to go along. Music from others will chime in unprincipled 　　Usage: As a predicate, attributive, adverbial; for life skills 　　Source: Qian Han, "Historical Records Fengshan book": "strange case of illicit sexual relations of only flattery, ... ... countless people." Thesaurus:  Ah Yi agree without justification