To add caffeine to.
To drink caffeinated beverages in order to increase one's energy or wakefulness or to enhance physical or mental performance.
To inject tension into (a situation, etc.) for one's own amusement; to stir things up.
To provoke (a person) for one's own amusement.
Containing caffeine naturally (e.g., coffee, tea, and cacao [whose seeds are used to make cocoa, chocolate, and their various derivative products]) or as an additive (e.g., soft drinks, sports drinks, or energy drinks).
Overly peppy or energetic (as in a person or pet).