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1.
A person who is always hungry; therefore, one who will eat (almost) anything.
Those gannets have eaten all the biscuits!
by WhiteTrashMan November 26, 2004
 
2.
another word for sombody who eats like a pig
you gannet.......... you ate all the pie!!!
by jakx February 27, 2007
 
3.
A sea bird with white plumage and black wingtips. Also slang for Breasts, boobs, knockers etc. Primarily used in the Wollongong area of NSW.
What a fantastic pair of gannets!
Check out the gannets on her!
by Gannet watcher April 11, 2006
 
4.
Someone who hangs around when they are usually unwanted and is only interested in what they can get out of people. They are generally annoying and often ruin what would otherwise be perfectly nice days out.
“Ugh, now I have to share my chips with her because she swooped in just as I bought them, she’s such a gannet."
by mummazumbe August 21, 2014