rackare

Swedish

rackare m

(historical) an assistant to an executioner
(dated) a blighter (one who behaves in an objectionable or pitiable manner)
(colloquial) a rascal (in a more-or-less endearing sense)
Din lilla rackare!
You little rascal you!
(colloquial) a devil (someone skilled)
Han är en rackare på TP!
He's a devil at Trivial Pursuit!

Deliberately quaint if used in an (actually) insulting sense in modern times.

Declension of rackare