1. prick (in the skin)

2. shot, jab (with a syringe)

3. injection

4. sting (bump in the skin made by an insect)

5. a small or medium amount of a strong alcoholic beverage (usually tequila, rum or brandy) poured in a non-alcoholic beverage, such as punch, coffee, juice, soda beverage, etc. (slang, Mexico)

6. picket line