Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

I'll thank you to do sth

formal

Definition

used to ask someone, in an annoyed way, to do something: I'll thank you to leave my private papers alone.Making appeals and requests
(Definition of I'll thank you to do sth from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)