Skankbag

A skankbag is any person who is being particularly annoying to you at that moment in time. The person being annoyed has the right to call said annoying person a skankbag at any given point in the time of their annoying-ness.

Kaycee: Do you remember that dress you tried on at the store that didn't fit that you really liked?

Taylor: Yes.

Kaycee: Well, I bought it for me and it looks great!

Taylor: You're a skankbag!!!