RichThesaurus
get one's knickers in a twist
vs
go off the deep end
get one's knickers in a twist
verb
To become overwrought or unnecessarily upset over a trivial matter.
go off the deep end
How often have the words
get one's knickers in a twist
and
go off the deep end
occurred in a corpus of books?
(source:
Google Ngram Viewer
)