Common slang umong military enlisted to salute an approaching person in uniform when uncertain of their rank. Better to be safe than sorry. More common with the NAVY as Chief Petty Officers have gold anchors on their collars and are often mistaken for gold oak leafs (signifying a Lieutenant Commander or Major).
Bill- "Don't look now, but here comes an officer"
Larry-"No, it looks like a Chief Petty Officer from here"
Bill-"When in doubt, whip it out. Better to be on the safe side then to ignore him if he was an officer".
Larry-"You're right"
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.
When a man will search for hours to find something that is laying out in the open on a table. Items are often easily found by a women.
Man: "I have been searching for hours for keys."
Woman: "You mean the ones sitting there on the coffee table?"
Man: "Where?"
Woman: "Right there in the middle of that table."
Man: "oh, must have been Male Pattern Blindness"