A vagina that is suitably irrelevant and therefore refered as such. The word irellavagina can be used to replace other words in a scentece when one can't think of the right word, or is just too lazy. For example:
"I just went and picked up some irellavagina. We were all out."
"I don't know what do to! Maybe I'll just irellavagina.
"God, Katie, could you be more of an irellavagina?"
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"