b. l. t.

BLT

plural BLTs.
a bacon, lettuce, and tomato sandwich.
Also, B.L.T.


Origin:
1950–55

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Slang Dictionary

BLT

/B-L-T/, /bl*t/ or (rarely) /belt/ n.,vt. Synonym for blit. This is the original form of blit and the ancestor of bitblt. It referred to any large bit-field copy or move operation (one resource-intensive memory-shuffling operation done on pre-paged versions of ITS, WAITS, and TOPS-10 was sardonically referred to as `The Big BLT'). The jargon usage has outlasted the PDP-10 BLock Transfer instruction from which BLT derives; nowadays, the assembler mnemonic BLT almost always means `Branch if Less Than zero'.
American Heritage
Abbreviations & Acronyms
BLT
  1. bilateral lung transplantation

  2. bacon, lettuce, and tomato [sandwich]

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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