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1.
Guliver means "head" from a combination of British Rhyming slang and Russian.

Made famous by "A Clockwork Orange"

The original Russian word is Guluva.
I swear mate, when 'e comes out o' the pub, I'm gonna smash em right in the guliver.
by Limeyone July 09, 2010
 
2.
English slang word refering to stomach or intenstines
"Iv a pain in my guliver, i wont be making it to school today mum."
reference clockwork orange the movie, for more great english slang such as bollucks
by gloopy January 23, 2008