putative -- Jack

pu·ta·tive  (pyt-tv) adj. Generally regarded as such; supposed. See Synonyms at supposed. [Middle English, from Old French putatif, from Late Latin puttvus, from Latin putre, to prune, think; see pau-2 in Indo-European roots.] puta·tive·ly adv.

The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

Jack is the putative Mr. Smart Guy at his school.