(n.) One who introduces new word or phrases.

Babbitt Philistine Young Turk boor bounder bourgeois bright young man cad churl clown comer emigrant epicier fledgling gate-crasher greenhorn groundling guttersnipe hooligan ill-bred fellow immigrant intruder looby lout low fellow modern modern generation modern man modernist modernizer mucker neologism neologist neology neonate neoteric neoterism neoterist new arrival new boy new generation new man newcomer nouveau riche novus homo parvenu peasant recruit ribald rising generation rookie rough roughneck rowdy ruffian settler squatter stowaway stripling tenderfoot upstart vulgarian vulgarist yokel