Person/People (usually with a university background or a similar form of higher education) who decide to speak in convoluted, very jargon oriented terms about general subjects/topics with the main intent to either: show off their supposed expertise; their superior intellect over their audience; or both.
The main feeling of their audience, however, would typically be "what a long-winded prick..." or a similar negative thought.
Expanding from this, politicians could be described as Jacademics with enhanced convolution and word play abilities.
Professor at dinner party: You know Charles, the stagnant, and you could even say bearish, state of the economy is fundamentally a result of the proliferation of questionable securities and derivatives products offered by major investment banks with the help of their Federal Reserve and Politician friends.
Thought of a general listener: What a Jacademic / Jackademic!
A student who gets good grades while engaging in regular recreational drug use...often used for college students who study during the weekdays and party hard on the weekend using coke/amp/Ecstasy or any type of uppers
Also can refer to someone who uses uppers such as Adderall or Speed to stay up studying
person 1: "I thought Kartik was a nerd because he's always in the library"
person 2: "nah man, i saw him at a rave on saturday rollin hardcore, he's definitely a crackademic"
person 3: "how does Ray pull all those all nighters and get such good grades?"
person 4: "dude he's such a crackademic, he pops addys to help himself focus and stay awake"