Jack-o-lard
That person who won’t stop bugging you for something, but once they get it, they act like it was the easiest thing in the world.
He kept bugging me for my lunch money. When I gave it to him, he just said 'No big deal.'
She kept bugging me for my pencil. When I gave it to her, she said 'I could’ve gotten it myself.'
He kept bugging me for my grade. When I fixed it, he said 'That was simple.'