NSW Opportunity Class
Blithe
adjective/BLYTH/
showing a casual and cheerful indifference considered to be callous or improper.
In contextHis blithe disregard for the rules frustrated the teachers.
Remember it
Blithe rhymes with 'scythe' — breezily carefree, even when they really should care.
Use it well
Slightly critical: 'blithe disregard or indifference' — the cheerfulness ignores real consequences.