laughing in disbelief; scoffing laugh
A laugh of exasperation or astonishment at something so silly or stupid that it's hard to take seriously.
I couldn't help but let out a scoffing laugh at his excuse.
The proposal was so absurd that I could only laugh in disbelief.
Standard kanji spelling.
Mixed kana-kanji spelling; less common but still seen.
Compound of 呆れ (the 連用形 of 呆れる, 'to be amazed/dumbfounded') and 笑い ('laugh').