A person physically incapable of minding their own business and not inserting themselves into any and everything else going on around them. Someone guaranteed to find their way into something that does not concern them.
See also nipshit or nibshit.
Even as I'm writing this definition, Brayden is coming over to check out what's going on. Such a nibnose, always sniffing about, thirsting for a whiff of bossage.
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"