If you refer to someone's freewheeling lifestyle or attitudes, you mean that they behave in a casual, relaxed way without feeling restricted by rules or accepted ways of doing things.
例句
He has given up his freewheeling lifestyle to settle down with his baby daughter.他放棄了自由放縱的生活方式，和幼小的女兒安頓下來。...an update on corporate affairs delivered in Johnson's unique, freewheeling style.約翰遜以他獨特的、隨意漫談的方式對公司事務所作的最新情況介紹
英英詞典釋義
Adjective
1. free of restraints or rules;
"freewheeling foolishness""the versatility of his poetic freewheeling style"
2. cheerfully irresponsible;
"carefree with his money""freewheeling urban youths""had a harum-scarum youth"