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!
To a child: Hurry and put your shoes on, Schnickelfritz!
Yiddish for HUGE penis admired by others. The reference is to the person as a schmuckaluvich because with a schmuckaluvich that attribute overshadows all else.
That schmuckaluvich has got it made with the girls.
Yo, schmuckaluvich, why don't you share some of that action?
Hey, Herbie's going out with that supermodel...is he a schmuckaluvich or what?