Similar to butt rice but found on a girls vagina. Clam rice is little pieces of toilet paper remnant are stuck to a vagina. Far more clam rice usually found the hairier the vagina is.
I went down on a chick last night. It was great until some clam rice got stuck on my tongue.
This is the pungent aroma that fills the air when the pants of a girl named Kristie, aka Krusty Kristie the Klown, are taken off. As a matter of fact, most of the time it can be present even with the pants on.
Man, once i got that girl Kristie horny it was like POW, clam sauce everywhere!