Sneaky has a range of meanings from the innocent expression you would say to a child affectionately, to offensive,
The meanings change from region to region in the UK. For example, sneaky in South Yorkshire can be mild to middling offensive, but in North Yorkshire can usually just be offensive.
It can mean crafty, underhand, untrustworthy, of bad character. It can be both affectionately hard or offensive.
If your in the mood for some intercourse; take it the sneaky way! Oh yes! You will have such a fucking good time, you'll moan and groan, and enjoy it so much! Being sneaky also means to prey on young high-schoolers and wanting to be "sneaky" with them {if you know what I mean ;)}
Johnathan one day felt some sneaky feelings towards Rachael. He did not act on them, until on fateful day, 29th of September 2018 when he woofed on her and boy, did she enjoy it!