A homosexual or "curious" male with a penchant for performing the sexual act of (rimming) on his passed out heterosexual friends. He also rims all things in life, never being successful at anything. The lovable looser that was well read in school and unathletic.
Jesus, that Rim Schickler got fired from another window tinting job? Maybe he should try rust-proofing!
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!