Top Definition
A member of the Republican Party who fails to support traditional conservative values in an attempt to appease his or her moderate-to-left constituents. A play on Yellow Dog Democrats, this term was chosen because gray represents neutrality and jellyfish are spineless. Coined by ar15.com user PBIR November 07, 2008
"There's no way that gray jellyfish Republican will support our 2nd Amendment rights, he's from a moderate sector of Florida."
by PBIR November 07, 2008

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