unable to stay still; unable to contain one's feelings; unable to restrain oneself
Idiomatic expression describing a state of being so overwhelmed by emotion or impulse that one cannot hold back or remain calm. Often used when someone is bursting with excitement, anger, or impatience.
嬉しさのあまり矢も盾もたまらず飛び出した。
So overjoyed that I couldn't contain myself and rushed out.
彼は怒りで矢も盾もたまらず、机を叩いた。
He was so angry he couldn't restrain himself and banged the desk.