Confirming plans only to then bail out last minute or go completely missing with a suspect/weak/epic excuse.
Also to pull a 'leonard'
"Where's Nick? He seemed so up for it and has been banging on for weeks that he was 100% going to be here but he's not here."
"Ah, he's probably leonarding / pulling a leonard"
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 manwill 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"