Here is a list of common coupon related abbreviations you will see used frequently on this website and on the message boards.

Q - coupon

B1G1 - Buy one get one (free)

OYNO - On your next order

CAT - Catalina (coupons printed at the register) 

Roll the cat -  Using a Catalina coupon to save again on your next order.

ISO - In search of

FFS - Free for shipping

ECB - Extra care buck (CVS)

WAGS - Walgreen's 

RR - Register rewards (walgreen's)