When a girl wipes after taking a pee and there's little toilet paper clumps left on her junk afterward. The little clumps of toilet paper are clam berries.
Ugh. I hate the summer, it's totally clam berry season. I think the crotch sweat makes more of them.
I was all about going down on that girl, until I saw how many clam berries she had down there. I mean, I'm a lover of fruit, but nobody wants to eat clam berries.