Originated from the childrens TV show, Recess, the strange comic book kids might say, "Gondor Primulon". Now transformed into modern day "goth/outcast" stereotype.
While the Elves sodomized the Dwarves, Gondor did the same to the Hobbits. They used Hobbits for underground sex slave trades. They also forced Hobbits and Dwarves to mate to produce an unholy offspring called Dwarbbits to use as a work force. Dwarbbits couldn't speak so it was Gondor's loop hole around labor laws of that time.
All of Middle Earth had a grudge on Gondor though because they were the reason for Mordor coming back to power in the first place. Kings of Gondor were known for giving in to peer pressure. Also, the Kings had a fettish with shiny objects and didn't like to lose jewelry which is how Middle Earth got so F'd up to begin with.
Shouting "For Gondor" makes the stupid act seem meaningful and awesome. This phenomena often occurs when under the influence of alcahol or cannabis.
Pot-head- Come on guys- FOR GONDOR!!!
Rita- He just won't listen to me, I don't know what to do!
Derek- What would Gondor do?! Huh?!
Rita-... Gondor would find a way.