keep six
v. phr.— «“She begged Ray not to hang around with (name withheld by the Sun) anymore. Ray said he had one more job to do with him and all he had to do was to go out to this area, and that is the area where the body was found, and keep six, and that’s all (he had) to do.” Keeping six is a street term for keeping watch.» —“Inquiry bombshell” by Tamara King Winnipeg Sun (Manitoba, Canada) July 27, 2006. (source: Double-Tongued Dictionary)
Further reading
Diamond dust, tapioca snow, and sugar icebergs — a 1955 glossary of arctic and subarctic terms describes the environment in ways that sound poetic. And a mom says her son is dating someone who’s non-binary. She supports their relationship, but...
Imagine telling someone how to get to your home, but without using the name of your street, or any other street within ten miles. Could you do it? We take street names for granted, but these words are useful for far more, like applying for a job or...
Perhaps from the military “watch your six,” meaning “watch your back.” Six = back is determined by using the numbers on a clock face, where 12 is directly in front, three is to the right, six is to the back, and 9 is to the left.