Rascally a. : Like a rascal; trickish or dishonest; base; worthless; -- often in humorous disparagement, without implication of dishonesty.

Example:
Some Rascally rabbits seem to have whittled away at the trunk of my baby apple tree, will it survive?

Taxonomy
Merriam-Webster Online Dictionary, Dictionary, webster, Word Games, Webster Online Dictionary with audio pronunciations, Custom Search, glossary, english, language, ESL, Search, ras, ly, ras-k, adjective, characteristic, rascal, adverb.

Defination from the web:
rascally from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "rascally" and related topics at Britannica.com. See a map of "rascally" in the Visual Thesaurus. Pronunciation Symbols. Share this entry: ...