feeling irritated or impatient because something is slow, stalled, or unresolved; frustrating; annoying.
待ち合わせの時間になっても彼は来ず、じれったい気持ちになった。
Even when it was the meeting time, he hadn't come, and I felt impatient.
説明が足りなくて仕事が進まず、じれったくて仕方がない。
Because the explanation was insufficient the work didn't move forward; it's unbearably frustrating.
彼の態度があまりにじれったくて、つい口を挟んだ。
His attitude was so exasperating that I couldn't help but interrupt.
結果が出るまでじれったくて夜も眠れなかった。
I was so restless waiting for the results that I couldn't sleep at night.