expression, noun which may take the genitive case particle 'no'
smarmy; unctuous; insincerely flattering
Describes a person or their speech as excessively and insincerely flattering, often with a negative connotation. The phrase combines お世辞 (flattery) with the mimetic たらたら (dripping, oozing), suggesting flattery that flows abundantly and insincerely.
彼のお世辞たらたらな態度にはうんざりだ。
I'm fed up with his smarmy attitude.
お世辞たらたらで褒められても、ちっとも嬉しくない。
Even if you praise me with insincere flattery, I'm not happy at all.