Definition of fulsome adjective from the Oxford Advanced Learner's Dictionary

 

fulsome

 adjective
adjective
BrE BrE//ˈfʊlsəm//
 
; NAmE NAmE//ˈfʊlsəm//
 
(disapproving)
 
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too generous in praising or thanking somebody, or in saying sorry, so that you do not sound sincere a fulsome apology He was fulsome in his praise of the Prime Minister. Word Origin Middle English (in the sense ‘abundant’): from full + -some.
See the Oxford Advanced American Dictionary entry: fulsome