While stopped at a stoplight, something in a nearby car catches your eye (sorority bumper sticker, etc) and in order to ascertain the nailablilty of the driver you let off the brake and idle into a position where you could reach ideal creeping angle. Also, known as a Creeping Jane for females.
“Look, that Isuzu has a “Sassy Chick” sticker on the bumper.”
“Pull a Creeping Tom up there to get a better look-see. I think we got something.”
“Weak dude, I let off my brake for that? She’s a 7.1 on the Nailer Scale.”