Something you do that turns people off from whatever they may be eying or interested in, thereby making them suddenly repulsed from that interest.
Jess: Can I have your crutons?
Jo: *dumps the ranch on her salad*
Jess: Never mind.
Jim: *looks at girl from behind* Hey she looks hot!
Larry: Watch her be a butterface.
*girl turns around, and is indeed a butterface*
Jim: Uggggh you just had to dump the ranch on it, didn't you?
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"