get (one's) dander up(redirected from gets one's dander up)
get (one's) dander up
To become annoyed or angry. Don't get your dander up with me—I'm just trying have a conversation here. I know I got my dander up a bit last night, so I understand why you're avoiding me.
get someone's dander upand get someone's back up; get someone's hackles up; get someone's Irish up; put someone's back up
Fig. to make someone get angry. (Fixed order.) Now, don't get your dander up. Calm down. I insulted him and really got his hackles up. Bob had his Irish up all day yesterday. I don't know what was wrong. Now, now, don't get your back up. I didn't mean any harm.
get your dander uplose your temper; become angry.
The sense of dander in this originally US expression is uncertain, as neither dandruff nor dunder (meaning ‘the ferment of molasses’) seems entirely plausible.