Definition of obsequiously adverb from the Oxford Advanced Learner's Dictionary

 

obsequiously

 adverb
adverb
BrE BrE//əbˈsiːkwiəsli//
 
; NAmE NAmE//əbˈsiːkwiəsli//
 
(formal, disapproving)
 
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in a way that shows you are trying too hard to please somebody, especially somebody who is important He was smiling obsequiously.