noun
A brief, involuntary episode of sleep; rare term, more commonly referred to as マイクロスリープ.
See also: マイクロスリープ
運転中にフラッシュ睡眠が起きると非常に危険だ。
It is extremely dangerous if microsleep occurs while driving.
More common loanword for the same phenomenon; フラッシュ睡眠 is a rare Japanese-coined alternative.
Compound of English 'flash' and Japanese 睡眠 (sleep). The exact derivation is uncertain; it may be a Japanese-coined term influenced by the English concept of microsleep.