When your doing a chick from behind and you stick your thumb up her brown-eye, then unexpectedly spin her around and wipe the crap under each of her eyes to make her look like a quarterback; hence a quarterback sneak.
Dude, I met this chick named Stacy at the club last night. I totally brought her back to my place and gave her a quarterback sneak. Then I threw her cloths out in the middle of the street so she would run out with crap on her face.
To sneakily rape or fuck a butt like a ninja or in a quick jump on top method (both willwork).
He waited for his time to strike sitting in the bushes just watching as andre walked outside to get the mail. Then out of nowhere kakaw!! Sneak Sex was applied on Andre's asshole.