- full of sap; be a sturdy sort; be impetuous and easily given to passions; be in a thriving way; buoyant and impetuous; full of vigour and vitality; be full of animal spirits; have plenty of animal spirits; high-spirited; hot-blooded; impetuous and ready to pick quarrels; in the green; the mettle of youth; vigorous and active:
youths of hot blood
血气方刚的青年