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2.
to go all out even though its not necessary.
Yankees still going full battle rattle even though they stomping the Twins!
by nashoba October 11, 2009
 
1.
To wear all of your combat gear, including IBA, Kevlar, FLC, elbow/knee pads, etc.
Man, don't expect to go out on a road march without going full battle rattle.
by hooah334 October 10, 2011