Someone with whom you enjoy their company and if a situation arose where you could hook up with them, you would want to. If you desire a relationship, the person may increase from minicrush status to a regularcrush.
"that chick has such a nice rack, I totally have a minicrush on her" or "She's so fun to be with, I think I have a minicrush on her"
Crushes one develops on another's intellectual fortitude that, while occasionally pursuable, are not actively pursued due to the inherent irrationality of said longings -- and the fact you don't talk to him/her in real life or, well, at all. Targets often include former MIT linguistics professors and random guys who write for scholarly/incredibly esoteric publications, and maybe 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"