look up any word, like sneak easy:
 
1.
When you slap your girlfriends butt progressively harder to gauge how rough she likes it, aka her rough sex index.
Ricky was giving Vanessa a series of progressively harder Curiosity Slaps. When her "oohs" turned to "ows" he knew he had found her rough sex index.
by Norris Jig January 20, 2010