full of vinegar

Full of vinegar is an idiom often used when referring to a person who tends to be full of youthful energy, boisterous and rowdy in the way they act on a daily basis. While not as common a phrase in todays language than it was a few decades ago, you may still hear this label in relation to someone young or an older person with this youthful energy. A person full of vinegar is most often very hyper and boisterous in their every day life.