Oxy for
Oxycontin the opioid pain killer - Cuntin for being bitchy,
complaining and being annoying to others around you.
Oxycuntin is a phase during opioid high where the user starts feeling sorry for her/him/them selve/s it`s an hour or so of extra self-pity.
Like when they say "the self-pity is strong with this one" he always Oxycuntin.