A person who puts off blatant jewish traits; such as extreme cheapness, a blatant disregard of someone or something for money, agreeing with anyone and everyone in order to fit in, or is just somebody who you really do not want to hang around with.
"Man, Morgan agrees with every single thing that Brandon says, what a dirty jewrat."

"Hey, pick that quarter up."
"Nah, Jewrat Morgan will get it."
by Showerpal April 15, 2010
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A person who is Jewish or displays traits commonly attributed to one who is Jewish. This person exhibits greed, selfishness, prejudice toward any non-Jewrats, and a generally hypocritical view toward life. A full-blooded Jewrat will often have a prominently bridged, larger than life nose. Audibly, the Jewrat can be heard from great distance by either jingling pockets or over-annunciated speech, or both.
Jimmy waited outside patiently for Synagogue to end, at which time he tossed a shiny penny into the crowd and watched as the Jewrats tore each other limb-from-limb in an attempt to increase their wealth.

Give me back my dollar you Jewrat!
by Jigga-Zilla November 26, 2007
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One of the lowest degrees of insult upon one of jewish decent
That bitch beat me in a game, what a jewrat.

Chris and Micheal are playing video games.

Chris: "not beating me today."

Micheal then proceeds to anniahlate Chris' charater.

Chris throws down the controller: "Fuckin JewRat!"
by Josh & Ian October 9, 2007
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