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.
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