Definitions by The Keeper of the Cookie Jar

Exploding your cookie 

When an excitable little boy (18+) prematurely ejaculates on a non-sexual body part of a woman who is wearing a dress (i.e. "naked").

When Ron Weasley first exploded his cookie on Hermione Granger. "Exploding your cookie"

Exploding your cookie by The Keeper of the Cookie Jar March 14, 2011