devilish, rascally, roguish(adj)
playful in an appealingly bold way
"a roguish grin"
rascally, roguish, scoundrelly, blackguardly(adj)
lacking principles or scruples
"the rascally rabble"; "the tyranny of a scoundrelly aristocracy" - W.M. Thackaray; "the captain was set adrift by his roguish crew"
In the manner of a rascal.
Like a rascal.
I'm going to get you, you rascally rabbit!
like a rascal; trickish or dishonest; base; worthless; -- often in humorous disparagement, without implication of dishonesty
The numerical value of rascally in Chaldean Numerology is: 8
The numerical value of rascally in Pythagorean Numerology is: 1