1. piss and vinegar - Noun
2. piss and vinegar - Phrase
piss and vinegar (uncountable)
(US) Exuberance or enthusiasm, especially to an excessive degree; bravado; youthful energy. [from mid-20th c.]
Synonym: spit and vinegar
I've gotta keep writing. But where's the next step, where do you go? But at my age, you start to get tired. You're not full of piss and vinegar. The vinegar's all gone. Mickey Spillane
Full of piss and vinegar. Traditional Proverb