From Longman Dictionary of Contemporary Englishbore/scare etc the pants off somebodybore/scare etc the pants off somebodyinformal spokenLOT/VERY MUCH to make someone feel very bored, very frightened etc She always bores the pants off me. → pants
Examples from the Corpus
bore/scare etc the pants off somebody• Though, mind you, it scares the pants off poor old Crumwallis.• The tests scare the pants off many managers.• It took ten minutes to reach Honey Cottage, with Yanto trying his best to scare the pants off Mary.• He wasn't interested in the heavy political stuff which bored the pants off most people.• Lovely people who scared the pants off him. 