lest we forget

American  

[lest wee fer-get] / ˈlɛst ˌwi fərˈgɛt /

idiom

1. we should not forget (often used as a cautionary phrase).

   Lest we forget, many large conflicts have started over small, insignificant areas.

   Lest we forget, fake news is still with us.

2. in case you have forgotten (used facetiously).

   The 1980s, lest we forget, was a terrible era for fashion.

---

Etymology

Origin of lest we forget

Refrain from Rudyard Kipling's poem “Recessional” (1897)

Example Sentences

Last weekend I watched as people queued to buy Remembrance merchandise from a pop-up retail shop: t-shirts bearing the words Lest We Forget, poppy-themed Christmas cards, napkins, water bottles, mugs, enamel poppies for your lapel, large plastic poppies for your car.

From BBC

Lest we forget our past, America is the great democratic experiment precisely because it’s a land of immigrants.

From Los Angeles Times

Lest we forget, there’s a murder, which opens the show in a flash forward; the series catches up with it by the end of Episode 3.

From Los Angeles Times

Lest we forget, the Dodgers are first and foremost a business, just like every other professional sports franchise.

From Los Angeles Times

Watching from the Mall, Grace Gothard, from Mitcham, made her Union Jack dress draped with the Ghanian flag while Satvinder Cubb, from Chingford made a frock made from two "Lest we forget" scarves.

From BBC