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Frickers Nickers is just slang for f**k. Fricker is like fudge it means f**k. Nickers are underwear, however its not slang, but it rhymes with Fricker so it went together. Its used when your mad at people or just messing with them.
'What the Fricker Nickers are you doing?'

Your such a Fricker Nicker.

by BiscutGravey November 01, 2010
It basically means Fucker
You dirty Fricker Nicker!

What the Fricker Nickers are you doing?!
by BiscutGravey May 13, 2011