To smack a foe or loved one in the face with a strong open handed downward motion then quickly and without pause reverse the momentum of said smack into an equal or greater strength upward motion back hand to the opposite side of the face.
When I found the asshole that took my last beer I gave that motherfucker a round tripper.
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"