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Synonyms

happy-go-lucky

American  
[hap-ee-goh-luhk-ee] / ˈhæp i goʊˈlʌk i /

adjective

  1. trusting cheerfully to luck; happily unworried or unconcerned.

    Synonyms:
    insouciant, lighthearted, blithe, heedless, carefree

happy-go-lucky British  

adjective

  1. carefree or easy-going

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of happy-go-lucky

First recorded in 1665–75