A willy which is cleverly disguised as a sofa/settee/arm chair. It can be a perticularly hairy sofa willy for detail.
Imagine a typical willy shape which would be drawn on a school desk. Put two circles on in the middle of each bollock. Add a stump at the bottom of each bollock to make the feet of the arm chair. Add other details such as material on the back part of it. You now have a Sofa Willy.
A variant of wet willy, combining the best aspects of Pop Rocks and wet willys. The person licks or spits on their finger, and then dips it into the Pop Rocks bag coating the finger tip with a layer of Pop Rocks. Then the attacker sticks this finger into the victim's ear canal and twists. The key is to have ample saliva on the finger such that the Pop Rocks start popping right next to the ear drum!
1. (noun) He thought himself a pimp for pulling off a Popwilly against Nahir.
2. (verbified!) Damn!! he just Pop willy'd yo ass!