To be more posh than something else. Surprisingly, 'posher' isn't in the dictionary -yet- which could cause some confusion to whether or not it actually is a word.
by Rhubarbius May 10, 2004
From the Yiddish abbreviation of Putz Knosher, or dick eater, Posher can mean a variety of things, from pussy to asshole to dick. All that matters is that you use it as a negative expression.
by ThatmanP January 18, 2011