Clam

A "clam" is a highly unsociable creature that lacks out-going ambitions. If you have a clam in your social circle they more than likely are always the person to deny doing anything besides staying at the their house and hanging out in their basement and smoking bongs. A typical clam will deny being a clam and will typically call others by their own putrid title, inorder flaunt their insecurity of their well-deserved title onto others.

"Ben, your a clam, you seriously will never do sh*t"

Person A: "Let's go play Frisbee at the beach man!"
Person B: "Nah, i'm not leaving my house"
Person A: "Clam...."