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.他放弃了自由放纵的生活方式，和幼小的女儿安顿下来。...an update on corporate affairs delivered in Johnson's unique, freewheeling style.约翰逊以他独特的、随意漫谈的方式对公司事务所作的最新情况介绍
英英词典释义
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"