adjective ( informal )
1.
cheerful, but careless about things that should be taken seriously :
a slap-happy approach to life
2.
( especially NAmE ) = punch-drunk
adjective ( informal )
1.
cheerful, but careless about things that should be taken seriously :
a slap-happy approach to life
2.
( especially NAmE ) = punch-drunk
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005