When you ejaculate forcefully on your girlfriend's face and a stream of cum hits her eyes and creates a cum lash. Like a frosty glazed eyelash but mostly made from warm thick cum.
I looked down at Debra who was looking up at me as she gave me one of her infamous BJ's. I shot a thick wad of load onto her face and lo and behold I noticed a large cum lash where her eyelashes should have been.