Those little things you see in your eye and when you try to look at it it swims away!
They're really just little particles of stuff that linger on your eye, making you think your hallucinating but it's just dust or little floating objects that collided with your eyeballs.
Man 1: I THINK I JUST SAW A GHOST
Man 2: I didn't see anything.
Man 1: Oh I just had Eye Floaties
When somebody you're penetrating from behind looks around at you with one wide eye over his/her shoulder as they squeal or gasp in pleasure or pain or with surprise.
She gave me the wicked dolphin-eye when I pulled it out of her coochie and threw it in her ass.