Definitions containing the term double back

What does double back mean?

BK	Back Medical » Physiology
][	Back to back Internet » Emoticons
TBS	Taking Back Sunday Community
DBL	Double Miscellaneous » Unit Measures
DBL	Double Community » Sports
RB	Running Back Community » Sports
BOB	Back Of the Book Academic & Science » Universities
BT	Back Trace Computing » Security
BRB	Be Right Back Internet » Chat
BRB	Be Right Back Computing » Texting
BTB	Back To Basics Miscellaneous » Unclassified
NIMBY	Not In My Back Yard Community
NIMBY	Not In My Back Yard Governmental » Transportation
SPDT	Single Pole Double Throw Business » Products
RBM	Roll Back Malaria Medical » Physiology
BBL	Be Back Later Internet » Chat
BBL	Be Back Later Computing » Texting
DBCS	Double Byte Character Set Computing » General
ESB	The Empire Strikes Back Miscellaneous » Science Fiction
ENDOR	Electron Nuclear DOuble Resonance Academic & Science » Electronics
DINK	Double Income, No Kids Community
DON	Double Or Nothing Miscellaneous » Unclassified
XX	Double Cross Governmental » Military
XX	Double Cross Governmental » US Government
034	( Double Quote) " Internet » ASCII Character Codes