4 ms·
it's also a spelling of "couldn't care less" spoken colloquially with the "'nt" swallowed, i think, and many just repeat what they hear so it becomes the idiom,
by jjtheblunt 4y ago
it's also a spelling of "couldn't care less" spoken colloquially with the "'nt" swallowed, i think, and many just repeat what they hear so it becomes the idiom, to your point.