push someone's buttons, to

push someone's buttons

Also, press someone's buttons. Draw a strong emotional reaction from someone, especially anger or sexual arousal. For example, My mother-in-law really knew how to push my buttons, or A good-looking redhead, she always seemed to press his buttons. This metaphoric expression transfers activating some mechanism by pushing buttons to human emotions. [Slang; 1920s]
See also: button, push
The American Heritage® Dictionary of Idioms by Christine Ammer.

push (or press) someone's buttons

be successful in arousing or provoking a reaction in someone. informal
See also: button, push
Farlex Partner Idioms Dictionary

push someone's buttons, to

To draw a strong emotional response from someone, usually negative. The term originated in the first half of the 1900s and has become a cliché. For example, “I said some negative things about the current administration and that really pushed Mary’s buttons—she exploded.” See also rub the wrong way.
See also: push
The Dictionary of Clichés by Christine Ammer
See also:
  • make points
  • make points (with someone)
  • score a point/points
  • score points
  • have had enough of (someone or something)
  • get someone's dander up, to
  • the red mist descends
  • see (the) red mist
  • leave (someone or something) in the hands of (one)
  • see red