noun, noun which may take the genitive case particle 'no'
youthful ardor; rash impulse of youth
Describes the passionate, sometimes reckless enthusiasm characteristic of young people. Often used in literary or reflective contexts. The cross-reference 青年客気 is a near-synonym.
See also: 青年客気
彼の行動は年少客気のなせるわざだった。
His actions were the result of youthful ardor.
年少客気の情熱が、時に大きな失敗を招く。
The passion of youthful ardor sometimes leads to great failure.
青年客気 is a near-synonym also meaning youthful ardor, but 年少客気 emphasizes the inexperience and rashness of youth more strongly.
Compound of 年少 (young, juvenile) and 客気 (ardor, rash impulse). The exact historical derivation is uncertain, but the combination conveys the impetuous spirit of youth.