faceful of joy
A faceful of joy is when a girl with big breasts either puts her boob on your face or almost does. It can be on purpose during sex or when she leans over and slips.
He was trying to read a book, but I gave him a faceful of joy.
She said she was just laughing, but I got a faceful of joy.
He thought he was getting a high-five, but I gave him a faceful of joy.