Definition of flashes:
(v) :
(transitive) To cause to shine briefly or intermittently.
(v) :
(intransitive) To blink; to shine or illuminate intermittently.
(v) :
(intransitive) To be visible briefly.
(v) :
(transitive) To make visible briefly.
(v) :
(ambitransitive, informal) To expose one's intimate body part or undergarment, often momentarily and unintentionally. (Contrast streak.)
(v) :
(figurative) To break forth like a sudden flood of light; to show a momentary brilliance.