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Someone who is so totally completely pan-handled that their friends would be able to place a punctured inflatable shark toy on their head with little resistance and proceed to chant "He's got a shark on his head, shaaark on his heeadd!" if they so pleased.
Look at hessy, man, he's chasing all the seagulls!
I know mate, but let him off, he has got a massive shark head afterall.
by BigOldSharkHead August 30, 2010
When a woman giving a blowjob uses her teeth in unpleasurable ways.
Cindy gave such bad sharkhead that I am pretty sure I was bleeding a little!
by SlimTal February 08, 2011