noun
Colloquial abbreviation of プレミアムフライデー, a government-backed campaign encouraging workers to leave early on the last Friday of the month.
See also: プレミアムフライデー
今月のプレフラは何時に帰れるかな。
I wonder what time I can go home on this month's Premium Friday.
プレフラの日は早く退社できる会社が増えている。
More companies are letting employees leave early on Premium Friday.