the.com/sneaky
Moving like a rumor: quiet, sideways, and gone before you can prove it.
means Acting in a secretive, underhanded way to avoid being noticed or caught.
from From the verb sneak, likely tied to Old English snican, to creep or crawl — the same low, slithering motion a snake never apologizes for.
Shakespeare coinedHe popularized sneak in print around 1600.
Snake cousinBoth trace to the same creeping Germanic root.
Sneaky-goodSlang flip: secretly excellent, not secretly evil.