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Acronym for "Best Left Forgotten". Usually implies that something is better left in the past, never to be remembered again.
Jony: Hey, whatever happened to the AirPower mat Apple was planning?

Tim: They could never get it to work. So it ended up in Apple's BLF archives.

Jony: BLF?

Tim: Best Left Forgotten. Kinda like the Lisa and hockey puck mouse.
by Casimus Prime May 30, 2019
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