An insult used to insinuate that an opinion does not matter or hold credence.
The term is derived from the phrase "my two cents" in an attempt to use sarcasm and irony to convey the lack of personal interest the speaker of the word holds for another's opinion.
The rather obvious portmanteaus of brain + Twitter. To communicate directly via the brain'selectrical impulses through Twitter. Reference:
Brain-Twitter project offers hope to paralyzed .