This term applies to people who are extremely intelligent. If a brainiac were a superhero, their brain would definitely be their secret weapon.
by MereBear803 May 9, 2011
 Get the Brainiacmug.
Get the Brainiacmug. Term of mild disrespect used to describe bright, studious people, such as scientists, chess-players or spelling bee champions.  Plural of brainiac.  Synonymous with certain usages of brain, geek, nerd etc.
by Linton November 6, 2003
 Get the brainiacsmug.
Get the brainiacsmug. Girls love Metaphor and I love em back, addicted to getting head, chicks call me the brainiac. 
From the Boondocks on Adult Swim
From the Boondocks on Adult Swim
by DiDo25878 January 4, 2008
 Get the Brainiacmug.
Get the Brainiacmug. by Robert December 12, 2003
 Get the Brainiacmug.
Get the Brainiacmug. by Spudz13 February 15, 2014
 Get the Brainiacmug.
Get the Brainiacmug. by mm October 29, 2003
 Get the Brainiacmug.
Get the Brainiacmug. by LaLaLander17 February 9, 2009
 Get the Brainiac yackmug.
Get the Brainiac yackmug.