The word "schnickelfritz" is a term of endearment of uncertain Germanic origin. It means something akin to 'rascal', 'scamp', or 'little chatterbox'. The word is usually used with children, but can also be used between others who are close with each other.
Also, Schnickel Fritz is a folklore character. Fritz was a rascally little boy. He also is mentioned in the Schnitzelbank song. (Google the song...I'm not chronicling it here.)
Johnny just played a trick on me and made me look silly; what a schnickelfritz!
From the Latin root 'schnick' a prefix capable of being used in the stead of any other word. Noun, verb, adverb, adj, vb.trans.
expanded through German to schnicknar while maintaining its original meaning.
A versatile word capable of replacing any other word. Eg. I can't find my schnicknar; or, If you're good I'll let you put your schnicknar in my schnicknar.
Further the word can be deconstructed and used in parts. Eg. Stop being such a dicknar; or, I can't eat my hotdog without snicktard.