A person who is constantly smoking crack but pretending they are going to quit.
Alyssa: hey Sara, you want to smoke some crack?
Sara: No, I'm off that shit.
Alyssa: ok, have it your way, more crack for me. <Alyssa takes a phat hit and blow it towards Sara>
Sara: Ok, ok.. give it to me.
Alyssa: you are such a crill.