Verb
(transitive) To add caffeine to.
(intransitive, slang) To drink caffeinated beverages in order to increase one's energy or wakefulness or to enhance physical or mental performance.
(transitive, slang) To inject tension into (a situation, etc.) for one's own amusement; to stir things up.
(transitive, slang) To provoke (a person) for one's own amusement.
Source: en.wiktionary.org