(one) can't sit still (for something)

1. One is unable to remain seated in a calm, placid, or attentive manner (for some particular event or activity). I was so excited about going to the fair that I couldn't sit still during breakfast. My children just can't sit still for these phone calls with my parents. A two-year-old can't sit still for long, so get used to taking blurry pictures!

2. One is unwilling to endure or tolerate something passively or submissively without acting in response. I couldn't just sit still for condescending, hypocritical remarks, so I gathered my things and walked right out of the building. We're not going to bow down to the governor's demands. What she's doing is wrong, and we can't sit still for it! You've been insulting me all evening long and I cannot sit still for it any longer!