Meaning of “get sth over with” - Learner’s Dictionary

get sth over with

phrasal verb with get us uk /ɡet/ verb present participle getting, past tense got, past participle got, US gotten

to do and complete something difficult or unpleasant that must be done:

I'll be glad to get these exams over with.

(Definition of “get sth over with” from the Cambridge Learner’s Dictionary © Cambridge University Press)