- Irish an Irishman who imitates English ways
C19: from Irish Gaelic Seoinín, diminutive of Seon John (taken as typical English name)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for shoneen
Sometimes you can hardly distinguish a squireen from a half-sir or from a shoneen.
Shoneen; a gentleman in a small way: a would-be gentleman who puts on superior airs.