vernacular (
http://definr.com/vernacular)
adj : being or characteristic of or appropriate to everyday
language; "common parlance"; "a vernacular term";
"vernacular speakers"; "the vulgar tongue of the
masses"; "the technical and vulgar names for an animal
species" [syn:
common,
vulgar]
n 1: a characteristic language of a particular group (as among
thieves); "they don't speak our lingo" [syn:
cant,
jargon,
slang,
lingo,
argot,
patois]
2: the everyday speech of the people (as distinguished from
literary language)