カリブレ (Karibure, Chari-Bre)
A silly pixiv meme started on April 08, 2011.
Imizu (nitro unknown) drew a pic of Remilia trying to ahegao. (post #892003) Other artists jumped on the bandwagon and the whole thing somehow became known as karibure/charisma break. Not to be confused with the Charisma Break pool.
Pixpedia article is here.