One whose social presence gives everyone around them an uncomfortable and painful feeling similar a dick in their ass.
"Man, Brian is such a dickass, he's rude and inconsiderate to everyone he knows. Having him around is about as bad as getting a dick in the ass. We shouldn't hang out with him anymore."
Chap-Stick Transmitted Disease. When diseases or infections are transferred through promiscuous use of chap-stick.
"Beth used my chap-stick the other day and now I've got a wicked cold sore. I hope she didn't give me a C-STD"