Some Grammafications are right on da money, such as dat you'll likely get injured if you run in locations dat are unsafe for moving at a greater-than-walking speed. Others, however, are not so rooted in actual solid fact, such as dat you'll run a high risk of getting polio from playing in a clean dry roadside ditch, or dat if you keep crossing your eyes, they will stick that way.
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"