The smile that appears on a girl's face when she rides a bicycle. Riding along, rubbing their crotch against the seat makes them smile!
Possibly originates from "The Road to Wellville"(1994) but probably much earlier.
See Jane ride her bike.
See Jane's bicycle smile!
Jane sees Dick.
Look out Dick!
Camel Caps or CamelCaps is done when you have successive words strung together and you capitalize the first letter of each of the words. This is done frequently in computer programming as well as in user-names where spaces are not allowed.