lessener
someone who looks down on you for not being up to their personal standards, be it age, race, or personal choices.
Example:
older guy: that kid over there was tryin to talk to me about politics, but i blew him off.
younger guy: wow what a lessener of you
older guy: that kid over there was tryin to talk to me about politics, but i blew him off.
younger guy: wow what a lessener of you