1.
faint smile; smirk; sneer
A slight, often unsettling smile that suggests mockery, insincerity, or hidden intent. Almost always carries a negative connotation, unlike a genuine smile.
Usage
薄ら笑い almost always has a negative connotation. It suggests the person is being insincere, mocking, or hiding something. It is not used for a genuine, warm smile.
Common collocations
Similar words
苦笑い is a wry or bitter smile at something awkward. 薄ら笑い is more sinister or unsettling.
Related Words
Compare:
苦笑い (wry smile)