put/get someone's back up
US /pʊt/ɡɛt ˈsʌm.wʌnz bæk ʌp/
UK /pʊt/ɡɛt ˈsʌm.wʌnz bæk ʌp/

1.
irritar, aborrecer
to annoy someone
:
•
His arrogant attitude really puts my back up.
A atitude arrogante dele realmente me irrita.
•
Don't say things that will get her back up.
Não diga coisas que vão irritá-la.