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.
Fudge Nucker is another word for a-hole or butt head. It could also mean a nut breaker (not the kind you eat) cuz' if you get offended girls you know where you're gonna kick a man.