RichThesaurus
get someone's Irish up
vs
ruffle someone's feathers
get someone's Irish up
verb
To anger or annoy someone.
ruffle someone's feathers
verb
To unease, cause discomfort to someone.
How often have the words
get someone's Irish up
and
ruffle someone's feathers
occurred in a corpus of books?
(source:
Google Ngram Viewer
)