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1. on your six
directly behind you. from the military designation of location where 12:00 is directly in front of you, 3:00 is to your right, 9:00 is to your left, etc.
Hang on, we've got two Japanese Zeroes on our six! I'll try to shake them!
by fizzle Apr 7, 2004 add a video
2. On your six
Watching your every move, after you, hunting you down.
If you dare mess up this deal I'will be on your six.
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