Pronounced sneek-lee-nis or sneek-uh-lee-nis. Either is just as acceptable as the last.

1. The ability to be sneaky, covert, or undercover.

2. The ability to sneak stylishly, often coming into close calls with being caught, but then charismatically escaping. Possibly pleasing an audience.
1. That dude has some insane sneakliness going on.
by The Real Cthulhu February 22, 2007
Get the sneakliness mug.
Being extremely sneaky while doing something bad or naughty
The boy was sneakly-sly while he was cheating off his friends paper.
by Dawniegee September 10, 2005
Get the Sneakly-sly mug.