eraser dust; eraser shavings; eraser crumbs
The small bits of rubber or debris left after using an eraser.
I brushed the eraser dust off the desk.
There are a lot of eraser crumbs on the notebook.
All-hiragana spelling, also seen.
Kanji spelling using 屑, less common in everyday writing.
Compound of 消し (keshi, 'erasing', from 消す) and クズ (kuzu, 'waste, scraps'). The katakana spelling クズ is often used to avoid the kanji 屑, which can carry a negative connotation.