noun: (slang) Clipping of vaccine. [(immunology) A substance given to stimulate the body's production of antibodies and provide immunity against a disease without causing the disease itself in the treatment, prepared from the agent that causes the disease (or a related, also effective, but safer disease), or a synthetic substitute.]
noun: (slang) Clipping of vaccination. [Inoculation with a vaccine, in order to protect from a particular disease or strain of disease.]