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1.
a homosexual man who engages in 'cottaging'
Don't use those lavs mate, they're full of cotti. Wait till be get to the pub
by Evooo August 31, 2007
 
2.
to give someone biscotti, an italian pastry.
18:36 * retroKTHXBYE cottis
by number25 August 24, 2003