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

1.
iemand de rug opzetten, irriteren
to annoy someone
:
•
His arrogant attitude really puts my back up.
Zijn arrogante houding zet me echt de rug op.
•
Don't say things that will get her back up.
Zeg geen dingen die haar de rug op zullen zetten.