Chicken-Related Acronyms:

ACV: Apple Cider Vinegar. Add to water to help w/ flock health.
APA: American Poultry Association
AS: Auto-sexing (characteristic) This is a true-breeding ability to distinguish day-old cockerels from pullets. ex. Cream Crested Legbar, Rhodebar, Norwegian Jaerhons, Bielefelder, and more.
BA/“Lorp”: Black/Australorp (color/breed)
Bator: Incubator
BBR: Black Breasted Red (color) ex. BBR Gamefowl
BBS: Blue/Black/Splash (color) ex. BBS Ameraucana
BCM: Black Copper/Marans (color/breed)
BF: Bantam Fowl (size) Smaller birds than LF.
BLRW: Blue Laced/Red/Wyandote (marking/color/breed)
BO: Buff/Orpington (color/breed)
BOB: Best of Breed (show title)
BOSS: Black Oil Sunflower Seeds (feed) good for skin/feathers.
BPR: Barred/Plymoth Rock (pattern/breed)
BQ: Breeder/Brood Quality -not show quality, but meets standard/close to it.
BR: Barred Rock (breed)
BR: Bourbon/Red (breed/color) ex. Bourbon Red Turkey
BSL: Black/Sex-link (color/breed) Sex-links are mixed breeds that result in just-hatched chicks being colored differently according to gender.
BTB: Black Tailed Buff (color) ex. BTB Japanese bantam
BTW: Black Tailed White (color) ex. BTW Japanese bantam
BV: Best of Variety (show title)
BYB: Backyard Breeder (usually has negative connotation)
CCL: *Cream/Crested/Legbar (color/attribute/breed)
CL: Clean-Legged – no feathers on legs
CM: Cuckoo/Marans (color pattern/breed)
CS: Coronation/Sussex (color pattern/breed)
DB: Dark/Brahma (color/breed)
DE: Diatomaceous Earth (supplement) good for natural topical pest control (internal use unverified) **Should be FOOD GRADE!**
EE: Easter Egger (sort-of breed) Mutt colored-egg layers or Ameraucanas who don't fit the standard. Many hatcheries misrepresent their EE's by calling them “Americanas” or other names of real breeds.
FBCM: French/Black Copper/Marans (standard/color/breed) BCMs meeting the FRENCH standard
GCM: Golden/Cuckoo/Marans (color/pattern/breed)
GF: Guinea Fowl (species)
GLW: Gold Laced/Wyandotte (color/breed)
GPH: Gold Penciled/Hamburg (color/breed)
JG: Jersey Giant (breed)
LF: Large Fowl (size) as opposed to bantam fowl.
MPC: My Pet Chicken (website) Sell small orders of chicks and accessories.
NHR: New Hampshire Red (breed)
NJ: *Norwegian Jaerhons (Breed)
OEG: Old English Game (LF breed)
OEGB: Old English Game Bantam (breed)
POL: Point of Lay – when a pullet should start laying eggs any day now.
RIR: Rhode Island Red (breed)
RSL: Red/Sex-link (color/breed) Sex-links are mixed breeds that result in just-hatched chicks being colored differently according to gender.
SBEL: Super Blue Egg Layers (Blue layer X High volume White layer) ex. Ameraucana X Leghorn
SDW: Silver Duck Wing (color)
SFH: Swedish Flower Hen (breed, not just females)
SLW: Silver Laced/Wyandote (color/breed)
SQ: Show Quality – excels in breed standard
WCP: White Crested Polish (breed)

Key:
* = Auto-sexing Breed