(名詞) 喜怒無常的情緒及態度如同十來歲青少年的三歲小孩。亦寫成 three-nager

Though my 3-year-old is a little more calm, he demands lots of attention and is a bit of a drama king at times. I like to refer to him as my "threenager." You never really know what mood he's going to be in, and he asks "why" at least 100 times in a day.
—Dana Kroh, quoted in "Readers tell us what makes their house a zoo," News & Record, May 12, 2013

I learned a new word recently that answers so many questions in my life right now.


In most online mommy circles — which are my stomping grounds these days — the term describes the teen angst and attitude coming from a 3-year-old.
—Dorothy Schneider, "3 going on 'threenager'," Rockford Register Star, June 23, 2013